It's a state function. If we know the enthalpy of the products minus the enthalpy of the reactants, right. It's a state function.

如果我们知道生成物的焓减,去反应物的焓的值,它是个态函数，原则上我们可以做到。

麻省理工公开课 - 热力学与动力学课程节选

It turns out we can express all these functions in terms of G, G we wouldn't need to choose G, but it's a very useful function to choose.

最终我们能把所有的这些函数,用自由焓G表示出来，我们没有必要选择，但是这个选择很有用。

麻省理工公开课 - 热力学与动力学课程节选

And that shows us that H is written naturally as a function of entropy and pressure.

这证明自由焓H很自然的可以写成,熵和压强的函数。

麻省理工公开课 - 热力学与动力学课程节选