等压“指压强不变。”

Whereas, like isobaric means constant pressure.

youdao

压强不变，体积变化。

So I need, well the pressure is constant, but there's a change in volume.

youdao

好只要压强不变，总压强不变，那么就应该用。

Well, as long as you keep the pressure, the total pressure, constant, Kx then you should be able to use Kx.

youdao

If I place my container of gas on the table here, and I come back an hour later, the pressure needs to be the same when I come back Otherwise it's not equilibrium.

如果我把装气体的容器放在桌子上，一小时以后我再回来时,气体的压强应该是不变的,否则它就不是平衡的。

麻省理工公开课 - 热力学与动力学课程节选

So what I'm doing here is I'm cooling, and then when I'm sitting at a fixed volume and I'm increasing the pressure, what am I doing? I'm heating, right?

对了，因此在这里，需要冷却,而在这里，当体积不变增加压强时？

麻省理工公开课 - 热力学与动力学课程节选

This is an example where the external pressure here is kept fixed as the volume changes, but it doesn't have to be kept fixed.

在我们举的这个例子中,外界压强不变，气体体积改变。

麻省理工公开课 - 热力学与动力学课程节选