Toluene and benzene form nearly ideal solutions and assume that Raoult's Law applies over the entire range of the composition. At 80oC, the vapor pressures of pure toluene and benzene are 0.387 bar and 1.004 bar, respectively.
Determine the benzene mole fraction xB of the liquid mixture at 80oC that results in a total vapor pressure of 0.60 bar and hence obtain the benzene mole fraction yB for the vapor in equilibrium with this liquid.