题目内容
当分子间距离从平衡位置(r=
)处增大或减小时,分子势能的变化情况是
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120109416938.gif)
A.分子间的距离增大,势能增大,分子间距离减小,势能减小 |
B.分子间距离增大,势能先增大后减小 |
C.分子间距离增大,势能先减小后增大 |
D.不论是距离增大还是减小,势能均增大 |
D
分子势能的变化决定于分子力做功情况,若分子力做负功,则分子势能增大.分子间距离大于
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120109416938.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120109416938.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120109416938.gif)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824120109416938.gif)
![](http://thumb2018.1010pic.com/images/loading.gif)
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