That for an ideal gas it has to be the case that there's no volume dependence of the energy.

我们可以直接推导这个结果,即证明对理想气体，内能和气体体积无关。

麻省理工公开课 - 热力学与动力学课程节选

So that you could see that for the ideal gas, u would not be a function of volume, but only of temperature.

所以我们可以看到对理想气体，内能不依赖于体积，而仅仅是温度的函数。

麻省理工公开课 - 热力学与动力学课程节选

Now, if this is an ideal gas, we know that pressure is equal to nRT over volume.

如果这是一个理想气体系统，我们知道压强等于nRT除以体积。

麻省理工公开课 - 热力学与动力学课程节选

And the fudge factor is called z.

理想气体的体积。

麻省理工公开课 - 热力学与动力学课程节选

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

For the ideal gas, we know that u is volume independent.

对于理想气体,我们知道u与体积无关。

麻省理工公开课 - 热力学与动力学课程节选