And for each component we have to describe its mole fraction in that particular phase.
对每一个组分我们都要知道，它在各个相中的摩尔分数。
You decrease the mole fraction of the less volatile material in the gas phase.
更不易挥发的物质，在气相中的，摩尔分数减小了。
So what's the mole fraction of B in the gas phase?
那么B在气相中的摩尔分数是多少？
OK, so we're going to look at temperature and mole fraction phase diagrams.
好，让我们看看温度,和摩尔分数相图。
It's the molar fraction of B in the gas phase times the total pressure.
这分压等于气相中b的摩尔分数，乘以总压强。
PROFESSOR: No. Because, so it's the mole fraction in the gas phase.
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.
教授：不，因为这是气态中的摩尔分数。
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