我们之前不是讲过，越到海洋的深处，压强就越大吗？
Didn't we talk before about how the deeper down into the ocean you go, the greater the pressure?
我们在化学中所做的很多都是在恒定的温度和压强下进行的。
So much of what we do in chemistry does take place with constant temperature and pressure.
我们关心的大多数过程都是在保持压强、温度或体积不变的情况下发生的。
Most processes that we're concerned with will happen with something held constant like pressure or temperature or volume.
即压强乘以体积等于，摩尔数乘以。
This is the pressure times the volume RT equals the number of moles times RT.
我们会降低压强，体积就会变大。
We're going to drop the pressure, the volume is going to go up.
也就是，摩尔分数不再是，压强的函数。
Namely, instead of showing the mole fractions as a function of the pressure.
对吉布斯自由能是压强，温度和粒子数。
For the Gibbs free energy it was the pressure and the temperature, the number of particles.
当液面升高的时候，这里的压强就增加了。
If the liquid level goes up, it raises the pressure down here.
我想回到小一点的压强。
我想找到总压强作为，气相中组分的函数。
So I'm going to find the total pressure as a function of the composition in the gas phase.
我先考虑总压强，等于水的蒸汽压的情况。
I'm going to have the total pressure is going to be the partial pressure of the water.
两摩尔反应物。，如果我改变压强会怎么样？
Two moles reactant... What happens if I change the pressure?
告诉我们总压强，共存曲线上分压和组分比。
Tells you the pressure of, the total pressure, or partial pressure at coexistence and the composition.
减小压强的方法就是，减小容器内的摩尔数。
And the way to decrease the pressure is to decrease the number of moles in the container.
我们慢慢改变外部压强，这个过程也是绝热的。
We've changed the external pressure slowly, and again this is isothermal.
它只取决于压强，体积，温度这些量。
It just CARES that you know the pressure, the volume, the temperature, or any couple variables.
这就是这里的压强勒夏忒列原理，有什么问题吗？
And that's what happens for Le Chatelier here with pressure. Any questions?
但是当压强升高的时候，化学式也会改变，上升。
But as the pressure rises, now the chemical potential changes and goes up.
因为我们想要的是，总压强作为气相组分的函数。
Because really what we want is the total pressure as a function of the composition in the gas phase.
到达某个程度时化学势，会由于压强的改变而平衡。
And at some point the chemical potentials will equalize because of the change in pressure.
当你以这种方式提升压强，你会有越来越多的液体。
And as you work your way up in pressure, you'd have more and more liquid.
然后到达一点，液体上几乎没有压强，在液体上面。
But then you get to a point where there's just barely any pressure on top of the liquid.
因为水的进入，所以内部的压强会高很多。
And there's going to be excess pressure because of the water rushing into the solution.
下次我们会讨论平衡常数对温度,和压强的依赖关系。
Next time we'll talk about the temperature dependence and the pressure dependence of equilibrium constants.
换句话说，在改变压强和体积的乘积时，发生了什么？
In other words, what matters here in changing the pressure volume product?
他们在大气压强下做所有的实验，他们得到一级速率。
They were doing all their experiments at atmospheric pressure. They were getting a first order rate.
物质的沸点，或者升华温度是什么？，在某个压强下？
What's the boiling point or the sublimation temperature of some material at a particular pressure?
在平衡时，这边A的分压，等于这边的压强。
At equilibrium, the partial pressure of a here has to be the same as the pressure on this side here.
那么所有的，两个分压，和总压强会比，这里指示的低。
So all the, both of the partial pressures and the total pressure are going to go lower than indicated here.
这里压强将会有偏移,因为A和B的相互作用。
There's going to be a deviation because of the interactions between A and B.
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