Whereas under these conditions, these quantities, if you look at free energy change, for example at constant temperature and pressure, H you can still calculate H.

但是，在这些条件下，这些物理量，如果我们考察自由能的变化,例如在恒定的温度和压强下，我们仍然可以计算。

麻省理工公开课 - 热力学与动力学课程节选

So, all I want to do now is look at the derivatives of the free energies with respect to temperature and volume and pressure.

我现在所要做的一切就是,考察自由能对,温度，体积和压强的偏导数。

麻省理工公开课 - 热力学与动力学课程节选

So again with the Gibbs free energy, now I see how to determine, if I change the pressure, if I change the temperature by some modest amount, how much is the Gibbs free energy going to change?

再一次通过吉布斯自由能，我知道当我，适当的改变压强和，温度的时候，吉布斯自由能如何变化？

麻省理工公开课 - 热力学与动力学课程节选