P dV is equal to R dT. pV = RT for 1 mole, pdV=RdT so I just take dV here.

对等压过程，那么。

麻省理工公开课 - 热力学与动力学课程节选

It's true for any gas, and if I remove this limit here, r t is equal to p v bar, I'm going to call that an ideal gas.

这样的气体被称作理想气体,这就是理想气体的性质，理想气体的涵义是什么？

麻省理工公开课 - 热力学与动力学课程节选

I'm going to call it r. It's going to be the gas constant, and now I have r times t is equal to the limit, p goes to zero of p r.

如果去掉p趋于0的条件,在有限压强下都,保持RT=pV的关系。

麻省理工公开课 - 热力学与动力学课程节选

So I can instead of the dV here, I can insert this R over p dT.

两个p消掉了，结果。

麻省理工公开课 - 热力学与动力学课程节选