题目内容
太阳内部有多种热核反应,其中的一个反应方程是:
.
①若已知
的质量为m1,
的质量为m2,
的质量为m3,
的质量为m4,则这个反应释放的核能
= .②若已知
H的平均结合能是2.78MeV,
H的平均结合能是1.09MeV,
He的平均结合能是7.03MeV, 则这个反应释放的核能
= MeV。(结果保留三位有效数字)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210750393863.png)
①若已知
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210751391398.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210752155395.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210753263438.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210754605386.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210755619407.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210756679272.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210757818281.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210758785292.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210755619407.png)
①
②17.6
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210801172803.png)
试题分析:①由爱因斯坦质能方程可知该反应质量亏损为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210802202612.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210755619407.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210801172803.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210756679272.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210757818281.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210758785292.png)
点评:本题难度较小,注意掌握核反应与结合能、释放、吸收能量之间的关系
![](http://thumb2018.1010pic.com/images/loading.gif)
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