那么B在气相中的摩尔分数是多少？

So what's the mole fraction of B in the gas phase?

youdao

让我们代入，这个表中的摩尔分数。

So let's plug in what these mole fractions are from our table here.

youdao

好，这是二点温度下的液态摩尔分数。

So, here is the liquid mole fraction at temperature two.

youdao

好，让我们看看温度,和摩尔分数相图。

OK, so we're going to look at temperature and mole fraction phase diagrams.

youdao

这是气体中a的摩尔分数。

Well it's the mole fraction of a in the gas.

youdao

教授：不，因为这是气态中的摩尔分数。

PROFESSOR: No. Because, so it's the mole fraction in the gas phase.

youdao

这是yB，气相摩尔分数。

Here's yB. The gas mole fraction.

youdao

其中有一些摩尔分数的。

B so it's got some mole fraction of B.

youdao

你会和之前开始的时候，有不同的摩尔分数。

And you'll have some different mole fraction than you started with before.

youdao

这是液相的摩尔分数。

So this is the mole fraction of the liquid.

youdao

这就是B的摩尔分数。

So that's our mole fraction of B.

youdao

这分压等于气相中b的摩尔分数，乘以总压强。

It's the molar fraction of B in the gas phase times the total pressure.

youdao

气体摩尔分数。

The gas mole fraction.

youdao

更不易挥发的物质，在气相中的，摩尔分数减小了。

You decrease the mole fraction of the less volatile material in the gas phase.

youdao

摩尔分数很小。

Very small mole fraction.

youdao

对每一个组分我们都要知道，它在各个相中的摩尔分数。

And for each component we have to describe its mole fraction in that particular phase.

youdao

对每一个组分我们都要知道，它在各个相中的摩尔分数。

And for each component we have to describe its mole fraction in that particular phase.

youdao