And the path that I'm describing then, let's assume that we're raising the temperature up is this path right here.
经过一个,等压过程,路径就是这样。
P dV is equal to R dT. pV = RT for 1 mole, pdV=RdT so I just take dV here.
对等压过程,那么。
Path number 2 on my diagram it's a reversible, this path number 2, it's a reversible constant pressure path.
路径,首先是一个,等压过程。
This is just an equality. I have a constant pressure dH process. This term here is equal to zero.
这是一个等式,这是个恒压过程,这项等于零,这意味着。
So then, going from the initial to final states with a red path, ou start with an isobaric processand then you end with an isothermal process.
因此沿着,这条红色路径,你从一个等压过程开始,以一个等温过程结束。
So, this path right here from this top red path is an isobaric process.
所以上面这条红色的路径,就是个等压过程。
If you have an isobaric you're going to have to calculate where the energy changes, and that's a calculation that's likely on the homework and very like on an exam as well, too.
在等压过程中,我们需要计算能量的变化,我们在作业,和考试中,就会遇到这类问题。
So the first path then, the first path, 1 constant volume constant V, so I'm going to, again, let's just worry about energy.
首先,是路径,等压过程。
This depends on the path. It tells you right here the path is constant pressure. These don't depend on the path, right. V doesn't care how you v get there. u doesn't care how you get there.
这由变化的具体路径决定,这个小脚标表明过程是恒压的,这些量都与具体路径无关,即不管是通过什么路径使得体积变化为Δ
So that's going to have to be a constant pressure path.
它应当包含,一个等压过程。
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