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

Cv So, for Cp and Cv, these are often quantities that are measured as a function of temperature, and one could, in fact, calculate this integral.

一般Cp和,都是温度的函数，因此实际上，我们可以将这个积分计算出来。

麻省理工公开课 - 热力学与动力学课程节选