题目内容
(6分)气缸长为L=1m,固定在水平面上,气缸中有横截面积为S=100cm2的光滑活塞,活塞封闭了一定质量的理想气体,当温度为t=27℃,大气压为p0=1×105 Pa时,气柱长度为l=0.9m,气缸和活塞的厚度均可忽略不计.求:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250012052901510.png)
①如果温度保持不变,将活塞缓慢拉至气缸右端口,此时水平拉力F的大小?
②如果气缸内气体温度缓慢升高,使活塞移至气缸右端口时,气体温度为多少摄氏度?
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250012052901510.png)
①如果温度保持不变,将活塞缓慢拉至气缸右端口,此时水平拉力F的大小?
②如果气缸内气体温度缓慢升高,使活塞移至气缸右端口时,气体温度为多少摄氏度?
①F=100N ②![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001205290577.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001205290577.png)
试题分析: ①由玻意耳定律得:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001205305902.png)
F=100N (1分)
②由盖—吕萨克定律得:
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250012053361022.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825001205290577.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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