题目内容
一定质量的理想气体经过一系列过程,如图所示.下列说法中正确的是 ( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241708336091853.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241708336091853.jpg)
A.a→b过程中,压强减小,体积增大 |
B.b→c过程中, 压强不变,体积增大 |
C.c→a过程中,,压强增大,体积不变 |
D.c→a过程中,,压强增大,体积变小 |
AC
试题分析:由图可知a→b过程中气体的温度保持不变,即气体发生等温变化,由图可知
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824170833625487.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824170833843605.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824170834109513.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824170834374490.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824170834639655.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824170834889502.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824170835123625.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824170835388617.png)
故选AC.
点评:从P-T上找出各物理量之间的关系是我们是我们解决此类问题的突破口.
![](http://thumb2018.1010pic.com/images/loading.gif)
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