一道sat物理问题if a gas is heated at constant pressure,its volume

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一道sat物理问题
if a gas is heated at constant pressure,its volume increase is proportional to the temperature 这个判断答案说是不对但不是可以根据charles law 当压力一定时 T1/V1=T2/V2

If a gas is heated at constant pressure,its volume is proportional to the temperature.这个是对的.（Volume = Constant * Temperature,V= nR/P * t)
但是 volume increase指delta V.（V的变化）所以不一样.
再问：还有问你下这个公式使用时是用的开尔文温度题目中的temperature 能当成是开尔文温度吗？能不能直接说当压力一定时气体体积和摄氏度成正比
再答：不能。因为摄氏和Kelvin是一个固定差，比方说X。所以如果可以用的话，那么： (T1+X)/V1=(T2+X)/V2 T1/V1+X/V1=T2/V2+X/V2 X/V1=X/V2 V1=V2 所以不行，我是这么想的。

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