题目内容
已知湖水深度为20m,湖底水温为4℃,水面温度为17℃,大气压强为1.0×105Pa。当一气泡从湖底缓慢升到水面时,其体积约为原来的(取g=10m/s2,ρ=1.0×103kg/m3)
A.12.8倍 | B.8.5倍 | C.3.1倍 | D.2.1倍 |
C
水面时压强等于大气压
,
,在湖底时,
,
,根据理想气体状态方程
,解得![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210326253564.png)
因此答案C正确
【考点定位】理想气体状态方程
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210321043660.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210322135818.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242103232421043.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210324397761.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210325208796.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824210326253564.png)
因此答案C正确
【考点定位】理想气体状态方程
![](http://thumb2018.1010pic.com/images/loading.gif)
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