And our job is to find out what is the mathematical description of this path, this line in p-V's case that connects these two point.

我们的任务,就是找出，描述这条曲线的方程。

麻省理工公开课 - 热力学与动力学课程节选

p1 V1 OK, so in my diagram now, I have p1, V1 for my gas.

于是可以画出现在的p-V图。

麻省理工公开课 - 热力学与动力学课程节选

We want a relationship in p-V space, not in T-V space. So we're going to have to do something about that. But first, it turns out that now we have this R over Cv.

我们想要p-V空间中的结果，而不是T-V空间中的,因此需要做一些变换，先来看现在的关系，它跟R/Cv有关。

麻省理工公开课 - 热力学与动力学课程节选

So on the p-V diagram, then, V1 V2 p1 p2 there's a V1 here a V2 here, a p1 here a p2 here.

在p-V图上，这是。

麻省理工公开课 - 热力学与动力学课程节选

If it's a reversible process, we know the work is the area under the curve.

对可逆过程，功等于p-V图上。

麻省理工公开课 - 热力学与动力学课程节选