wqrobin
幼苗
共回答了17个问题采纳率:82.4% 举报
(1)
![](https://img.yulucn.com/upload/2/85/285d752bb373d9be97c8be45b3364398_thumb.jpg)
(2)
(1)对活塞受力分析:
![](https://img.yulucn.com/upload/e/0d/e0d71d3e47499b20de6ac34a2f4ba61c_thumb.jpg)
------------1分
得:
![](https://img.yulucn.com/upload/2/85/285d752bb373d9be97c8be45b3364398_thumb.jpg)
------------------------------1分
(2)气缸倒置后:
对活塞受力分析得:
![](https://img.yulucn.com/upload/f/83/f83b8ecf578e07c923857ceb1b4171aa_thumb.jpg)
------------------------------------------------1分
所以
![](https://img.yulucn.com/upload/4/9e/49e3d84becdefa8e965b444fb09c222f_thumb.jpg)
----------------------------------------------------1分
对封闭气体运用玻玛定律
![](https://img.yulucn.com/upload/9/00/90060480177bb43b8e9e9c5e19392c01_thumb.jpg)
-------------------------------------------------1分
得:
![](https://img.yulucn.com/upload/1/d5/1d5f26f210e152bbeac25dd11856e9eb_thumb.jpg)
------------------------------------------1分
所以
![](https://img.yulucn.com/upload/4/7c/47c4b2c50303fae1e22f96b7c193ab85_thumb.jpg)
----------------------------------------------------1分
本题考查气体的状态方程,对活塞进行受力分析,由受力平衡原理可求得气体压强,汽缸倒置后再一次对活塞受力分析,可求得气体内部压强,两个状态的PV相同,列式求解
1年前
8