1. An equimolar mixture of benzene and toluene is subjected to flash distillation at a pressure of 1 bar in the separator. Determine the compositions (in mole fraction benzene) of the liquid and vapor leaving the separator when the feed is 30% vaporised. Equilibrium data for benzene- toluene system at 1 bar is given in below the table. (80%) Temperature (C) 80 1.0 85 90 Mole fraction benzene in liquid Mole fraction benzene in vapor 1.0 0.78 0.9 0.58 0.78 0.41 0.64 0.26 0.45 0.13 0.26 0.0 0.0 95 100 105 110