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		<h1>Học tốt Vật lí 12, bài 39&#x3A; Phản ứng nhiệt hạch</h1>
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			Hệ thống kiến thức lí thuyết cơ bản cần nhớ, hướng dẫn trả lời câu hỏi sách giáo khoa và giải bài tập Vật lí 12, bài 39: Phản ứng nhiệt hạch
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			<div style="text-align: justify;"><strong><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">A. Kiến thức cơ bản</span></span></span></strong><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>1. Phản ứng nhiệt hạch:</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Là phản ứng trong đó hai hay nhiều hạt nhân nhẹ tổng hợp lại thành một hạt nhân nặng hơn.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>2. Điều kiện để phản ứng nhiệt hạch xảy ra:</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Nhiệt độ cao khoảng 100 triệu độ.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Mật độ hạt nhân trong plasma phải đủ lớn.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Thời gian duy trì trạng thái plasma ở nhiệt độ cao 100 triệu độ phải đủ lớn.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>3. Năng lượng nhiệt hạch:</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Phản ứng nhiệt hạch tỏa ra năng lượng rất lớn.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Năng lượng nhiệt hạch là nguồn gốc năng lượng của hầu hết các sao.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>4. Ưu việt của năng lượng nhiệt hạch:</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Nguồn nguyên liệu dồi dào.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Phản ứng nhiệt hạch không gây ô nhiễm môi trường</span></span></span><br  />
<br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>B. TRẢ LỜI CÂU HỎI C1 SGK VẬT LÝ 12 BÀI 39</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>C1. Hãy tìm ra kết quả này dựa vào các số liệu cho trong bảng ở cuối sách.</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><u>Trả lời:</u></i></b></span></span></span><br  />
<img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-1.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>H +&nbsp;</b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-2.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>H </b><b>= </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-3.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>He + </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-4.png" width="23" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:8.5pt"> </span></span></span></span></span></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Khối lượng của các hạt nhân là:</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">m<sub>D</sub>= 2,01345 u ; m<sub>T</sub>= 3,0155 u</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">m<sub>α</sub>= 4,0015 u ; m<sub>n</sub> = 1,00866 u</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Năng lượng tỏa ra khi tổng hợp 1 hạt nhân α là:</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">W = (m<sub>D</sub> + m<sub>T</sub> - m<sub>α</sub> - m<sub>n</sub>).c<sup>2</sup></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">= (2,01345 u + 3,0155 u - 4,0015 u - 1,00866 u).c<sup>2</sup></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">= 0,01879.c<sup>2</sup> = 0,01879. l,66055.10<sup>-27</sup>.9.10<sup>16</sup></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">= 0,2808.10<sup>-11</sup> J</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">=</span></span></span><img alt="" height="39" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-5.png" width="81" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:11.5pt"> </span></span></span></span></span>e.v</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">= 0,1755.10<sup>8 </sup>ev = 17,55(MeV)</span></span></span><br  />
<br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>C. TRẢ LỜI CÂU HỎI VÀ BÀI TẬP SGK VẬT LÝ 12 BÀI 39 TRANG 203</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>1. Hãy nêu lên các điều kiện để phản ứng nhiệt hạch có thể xảy ra.</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><u>Trả lời:</u></i></b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Điều kiện để phản ứng nhiệt hạch có thể xảy ra là:</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Nhiệt độ cao khoảng 100 triệu độ</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Mật độ hạt nhân trong plasma phải đủ lớn</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Thời gian duy trì trạng thái plasma ở nhiệt độ cao 100 triệu độ phải đủ lớn.</span></span></span><br  />
<br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>2. So sánh (định tính) phản ứng nhiệt hạch và phản ứng phân hạch về các đặc điểm:</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">a. Nhiên liệu phản ứng;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">b. Điều kiện thực hiện;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">c. Năng lượng tỏa ra ứng với cùng một khối lượng nhiên liệu;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">d. Ô nhiễm môi trường.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><u>Trả lời:</u></i></b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">So sánh (định tính) phản ứng nhiệt hạch và phản ứng phân hạch</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Với phản ứng nhiệt hạch ta thấy:</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">a. Nhiên liệu cho phản ứng dồi dào, Đêtêri có sẵn trong thiên nhiên, tức dễ dàng điều chế.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">b. Điều kiện thực hiện khó khăn hơn: nhiệt độ rất cao.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">c. Năng lượng tỏa ra với cùng một khối lượng nhiên liệu thì lớn hơn: năng lượng tỏa ra khi tổng hợp 1g hêli gấp 10 lần năng lượng tỏa ra khi phân hạch 1g Urani.</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">d. Nhiễm môi trường tái sản phẩm cuối cùng của phản ứng nhiệt hạch không có tính phóng xạ nên không gây ô nhiễm môi trường.</span></span></span><br  />
<br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>3. Trên một số sao người ta tìm thấy các hạt nhân cacbon có vai trò xuất phát điểm của một chuỗi phản ứng tổng hợp (được gọi là chu trình CNO). Hãy hoàn chỉnh các phản ứng đó.</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">1. </span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-6.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>C + </b></span></span></span><img alt="" height="25" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-7.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:5.5pt"> </span></span></span></span></span><b>→ </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-8.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>N</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">2. </span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-9.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>N </b><b>→ </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-10.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>C + ?</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">3. </span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-11.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>C + </b></span></span></span><img alt="" height="25" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-12.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:5.5pt"> </span></span></span></span></span><b>→ </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-13.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>N</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">4. </span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-14.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>N + </b></span></span></span><img alt="" height="25" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-15.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:5.5pt"> </span></span></span></span></span><b>&nbsp;</b><b>→ </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-16.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>O</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>5. </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-17.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>O </b><b>→ </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-18.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>N + ?</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>6. </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-19.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>N + </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-20.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>H &nbsp;</b><b>→ </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-21.png" width="16" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>C + ?</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><u>Giải:</u></i></b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Các phản ứng tổng hợp:</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">1. </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-22.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:8.5pt"> </span></span></span></span></span>C + </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-23.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">H → </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-24.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">N</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">2. </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-25.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">N → </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-26.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C +&nbsp;</span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-27.png" width="17" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">e &nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">3. </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-28.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C + </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-29.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">H → </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-30.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">N</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">4. </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-31.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">N + </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-32.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">H → </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-33.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">O</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">5. </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-34.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">O → </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-35.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">N + </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-36.png" width="17" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">e &nbsp;</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">6. </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-37.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">N + </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-38.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">H &nbsp;→ </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-39.png" width="15" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">C + </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-40.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">He</span></span></span><br  />
<br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>4. Xét phản ứng: </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-41.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>H + </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-42.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>H &nbsp;</b><b>→ </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-43.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>H</b><b>e +&nbsp;</b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-44.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>n</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><i>a. Xác định năng lượng tỏa ra bởi phản ứng đó (tính ra MeV và ra J).</i></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><i>b. Tính khối lượng đơteri cần thiết để có thể thu được năng lượng nhiệt hạch tương đương với năng lượng tỏa ra khi đốt 1 kg than.</i></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><i>Cho biết: </i></span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-45.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><i>H = 2,0135u ; </i></span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-46.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><i>H</i><i>e = 3,0149u ; </i></span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-47.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><i>n = 1,0087u</i></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><i>Năng lượng tỏa ra khi đốt 1 kg than là 30000kJ.</i></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><u>Giải:</u></i></b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Xét phản ứng:</span></span></span><br  />
<img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-48.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>H + </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-49.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>H &nbsp;</b><b>→ </b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-50.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>H</b><b>e +&nbsp;</b></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-51.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>n</b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">a.<b> </b>Năng lượng tỏa ra:</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">W = (m<sub>H</sub> + m<sub>H</sub> – m<sub>He</sub> - m<sub>n</sub>).c<sup>2</sup></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">= (2,0135u + 2,0135u - 3,0149u - l,0087u).c<sup>2</sup></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">= 3,4.10<sup>-3</sup>.u.c<sup>2</sup> = 3,4.10<sup>-3</sup>.931,5 MeV = 3,1671 MeV</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">= 3,1671.1,6.10<sup>-13</sup> = 5,06736.10<sup>-13</sup> J = 5,07.10<sup>-13</sup> (J)</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">b. Mỗi phản ứng cần 2 hạt </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-52.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:8.5pt"> </span></span></span></span></span>H và cho ra 1 hạt </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-53.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:8.5pt"> </span></span></span></span></span>He</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Đốt 1 kg than cho 3.10<sup>7</sup> J. tương đương với năng lượng tỏa ra bởi N hạt </span></span></span><img alt="" height="30" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-54.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:8.5pt"> </span></span></span></span></span>He<b> </b></span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">N = </span></span></span><img alt="" height="39" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-55.png" width="65" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:11.5pt"> </span></span></span></span></span>= 5,917.10<sup>+19</sup>(hạt)</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Mỗi phản ứng cần 2 hạt<strong> </strong></span></span></span><img alt="" height="31" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-56.png" width="8" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:8.5pt"> </span></span></span></span></span>H </span></span></span><strong><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;</span></span></span></strong><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">Khối lượng Đơtêri tổng cộng phải cần đến là:</span></span></span><br  />
<span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif">m = </span></span></span><img alt="" height="39" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-57.png" width="41" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:12.0pt"> </span></span></span></span></span>= </span></span></span><img alt="" height="39" src="https://sachgiai.com/uploads/news/2019_08/image-20190817235937-58.png" width="86" /><span style="font-size:14pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:11.5pt"> </span></span></span></span></span>= 3,93 10<sup>-4</sup>g = 3,93.10<sup>-7 </sup>(kgđơtêri)</span></span></span></div>
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