If z is greater than 1, then the real gas means that the atoms and molecules in the real gas are repelling each other and wants to have a bigger volume.

如果Z大于,说明实际气体的分子间斥力较强,体积比理想气体要大,我们可以查表找到。

麻省理工公开课 - 热力学与动力学课程节选