Recall that the partial pressure of a gas (PGas)in a mixture is given by:
where χGas = mole fraction of the gas and Ptotal = total pressure of the gas mixture.
Isolating the mole fraction of the gas:
At 20 oC the vapor pressure of benzene C6H6 is 75 torr and that of toluene C7H8 is 22 torr. Assume that benzene and toluene form an ideal solution.
In a solution composed of benzene and toluene that has a vapor pressure of 36 torr at 20 oC, what is the mole fraction of toluene?
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