And so just like here, w2 now q2 is minus w2, that's integral going from three to four p dV.

就跟这儿一样，现在是q2等于负，等于从第三点到第四点过程的pdv的积分。

麻省理工公开课 - 热力学与动力学课程节选

So, the work for this process is the integral, pdv or minus the integral, V1, V2, p dV.

此过程中的做功等于负的积分，从v1到v2，外部。

麻省理工公开课 - 热力学与动力学课程节选

So there's p v work and it's given by the integral minus p external dv or just the integral from one to two of dw.

我们知道对于pv系统来说,功w可以写成黑板上的两种不同形式。

麻省理工公开课 - 热力学与动力学课程节选

That's equivalent to doing the integral, and so, what we end up getting is that the reversible work v2 pdv is equal to minus integral V1, V2, p dV.

这与刚才的积分过程效果相同，最后，我们得到的结论是可逆过程的功,是负的积分，从v1到。

麻省理工公开课 - 热力学与动力学课程节选