dT/dp is mu JT. So for a real gas like air, this is a positive number. It's not zero.

所以对于像空气这样的真实气体，这是一个正数，不等于零。

麻省理工公开课 - 热力学与动力学课程节选

I know I only need 2, so I can relate dV dV to dp through the ideal gas law.

我只需要两个就够了，因此可以用,理想气体状态方程消去。

麻省理工公开课 - 热力学与动力学课程节选

V So this nR over V. And then, using the relation again, T we can just write this as p over T.

恒定温度下的dp/dT等于nR除以，再次利用状态方程，可以把它写成p除以。

麻省理工公开课 - 热力学与动力学课程节选

This can be ascertained by looking at the size of the coefficients on DP and DP-squared.

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