And the cycle it's going to undertake is called a Carnot cycle, and it works the following way: we're going to do pressure volume work.

它的循环过程,叫做卡诺循环，过程如下：,这是个压强体积系统。

麻省理工公开课 - 热力学与动力学课程节选

I also want to assume for our present purposes that there's only pressure volume work going on, which is to say I want to put pdV p dV in here minus p dV for dw.

同时假定,对于我们目前的目的而言，只有压强做功这就是说,我要把这里的dw替换为负。

麻省理工公开课 - 热力学与动力学课程节选

So for the reversible process, the work done is the integral under the pressure volume state function, the function of state.

对可逆过程，做的功,是压强体积态函数曲线下，的积分面积。

麻省理工公开课 - 热力学与动力学课程节选

Because we did work at constant pressure, and so it's just volume difference times pressure.

因为是在恒压下做功，所以功就等于体积变化乘以压力。

麻省理工公开课 - 热力学与动力学课程节选