mole fraction

So more, relatively more, of A, A is going to be higher up in the gas phase.

It's not easy to calculate a priori what it's going to do all the way across the phase diagram for any mole fraction.

That means I could follow the same sort of procedure that I indicated before when we looked at the pressure mole fraction phase diagram.

Which is the form of the equilibrium constant not in terms of the partial pressures, but in terms of the mole fraction.

Mole Fraction - The number of moles of solute divided by the total number of moles in solution.

x So the mole fraction at any time is n minus x divided by the total number of moles, x which we just calculated as n plus x.

Now, you can draw the same diagram in, instead of pressure, mole fraction, you can draw the same diagram in terms of temperature.

And let's say the mole fraction of A in each of the liquid and gas phases, right?

The pressures over the pure liquid A and B at the limits of mole fraction of B being zero and one.

Then if I take the other limit, 0 where the mole fraction of CS2 goes to zero.

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

That the vapor pressure of the solute is related to the mole fraction in the solution.

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

So, for each phase alpha, we have to describe its mole fraction.

The same conclusion is obtained if we represent the relative volatility vs. the mole fraction of the solvent.

So this xB, which is the liquid mole fraction, is now yB, the gas mole fraction.

So that the vapor pressure of CS2 is related to the mole fraction of CS2 times the vapor pressure of CS2 if it was pure.

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

And then you have one non-linear relationship there for the mole fraction of the gas.

Very small mole fraction.

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

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

Now, of course, since this is a mole fraction, it's always between zero and one.

Here's yB. The gas mole fraction.

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

And then I have a non-linear relationship between the pressure and the mole fraction in the gas phase.

So this is the mole fraction of the liquid.

If we plot this versus xB, this is mole fraction of B in the liquid going from zero to one.

So this is the one that's showing us the mole fraction in the liquid phase.

So that means just reading off it, this is xB, that's the liquid mole fraction.

So that's our mole fraction of B.

And if we go over here, this is telling us about the mole fraction in the gas phase.

Estimating uncertainty of the WMO mole fraction scale for carbon dioxide in air

the vinyl monomers containing hydroxy is hydroxyethyl acrylate whose mole fraction is between 5 to 20 percent;