-
get back to the initial point is going to require some input from outside, like heat or extra work or extra heat or something because you've done an irreversible process.
如果要逆转它,回到初始点，就需要外界的投入，比如额外的功，额外的热量等等,因为你进行了一个不可逆过程。
-
This is equal to zero. So this irreversible process this Joule-Thomson process, is a constant enthalpy process. Delta h for this process is equal to zero.
等于0。所以这个不可逆过程,也就是焦耳-汤姆逊过程,是一个等焓过程。
-
So w, the work is less for the irreversible process than the reversible process.
不可逆过程中系统对外界,做的功要比可逆过程时小。
-
The energy expanded by the system is smaller for the irreversible process.
它做的,功要小些。
-
So for an irreversible process, I wouldn't really be allowed to put a path there.
不可逆过程，是无法画出路径曲线来的。
-
The temperature is not going to cool as much for the irreversible process.
对不可逆过程,降温不会有可逆过程多。
-
But now, so this is where the refrigeration comes in. So if you take a gas, and you're below the inversion temperature and you make it go through this irreversible process, the gas comes out colder from that side than that side.
这就是冰箱的原理,如果在低于转变温度,的情况下我们将气体经过,这个不可逆过程,气体出来的温度将比这边低。
-
So this is an irreversible process.
所以这是一个不可逆过程，焦耳-汤姆逊。
-
This is an irreversible process.
可逆过程中才成立，而这是个不可逆过程。
-
If I look at different points in my container during that path, I'm going to have to use a different value of pressure or different value of temperature That's not an equilibrium state, and that process turns out then to be an irreversible process.
如果我要研究在路径中容器里的,不同的点，我就得在容器里不同的点上使用,不同的压强值,或不同的温度值,实际上这不是个平衡态，这个过程是,不可逆过程。
-
Let me first ask you this, is this a reversible or in irreversible process? Right, let me add one more piece of data here which I said in words but which is actually important to write down before doing the problem.
让我先问你们，这是可逆过程,还是不可逆过程？好,让我加上一点简要的,但是很重要的前提,【p1>p2】这是可逆的吗？
-
if it's a reversible process then the equality holds, but if it's irreversible, which means it happens spontaneously, T then dS is greater than this.
对于可逆过程，等号成立，但是如果是不可逆过程，这些不可逆过程是自发进行的，那么dS大于dq除以。
应用推荐