So what they do is, they're describing how these thermodynamic properties change, in terms of only state functions and state variables.

他们的作用是描述,随着状态函数和状态变量的变化，系统的热力性质如何变化。

麻省理工公开课 - 热力学与动力学课程节选

All right, so this is the heat flowing in or out of the system, and these are all functions of state.

好的，这就是系统的热量变化,这些都是态函数。

麻省理工公开课 - 热力学与动力学课程节选

And we're actually going to get a little bit deeper in our clicker questions here, since when you do your problem-set it won't be quite this straight forward that you'll be answering this kind of question, but actually you'll be thinking about how many different orbitals can have certain state functions or certain orbital names.

事实上我们要讲的,比这个问题还要深一些，因为当你们做习题集的时候,你们不会遇到这么明显的问题，而是要考虑有多少个轨道,有某种特定的态函数,或者特定的轨道名字。

麻省理工公开课 - 化学原理课程节选

are all functions of state and parameters that we can control like temperature and pressure.

公式里面的全部都是态函数,我们控制态函数的参数比如温度或者压强。

麻省理工公开课 - 热力学与动力学课程节选

This is very different from the functions of state like pressure and temperature.

联系初末两态的整个过程,这与压强。

麻省理工公开课 - 热力学与动力学课程节选

This is only defined in terms of state functions.

但是他们只是态函数。

麻省理工公开课 - 热力学与动力学课程节选

There's no change in them, and then we also looked at some at non-state functions, work and heat, and saw that those aren't zero going around a cycle. Of course you can do work in a cyclic process, and heat can be exchanged with the environment at the same time.

它们不会有变化，然后我们研究了,一些非态函数，功和热量，并看到,沿着循环行进一周的话,它们并不是零，当然你可以在,一个循环过程中做功，而同时热量可以在系统,与外界环境之间进行交换。

麻省理工公开课 - 热力学与动力学课程节选

G Here, A and G, we've already got as functions of these easily controlled, conveniently controlled state variables.

这里，A和，我们已经把它们写成了，容易控制的状态变量的函数。

麻省理工公开课 - 热力学与动力学课程节选

And it's more dramatic if the system is a gas p T2 V2 p, T2, V2, And let's look at what happens to U these functions of state, to H to u under this transformation.

如果是气体这个系统,就更具有趣了,让我们看看H和，在这个变化中态函数会发生什么变化。

麻省理工公开课 - 热力学与动力学课程节选