An equimolar mixture of benzene and toluene is subjected to flash distillation at a pressure of 1 bar in the separator. Using the equilibrium data given below, determine the composition of the liquid and vapour leaving the separator when feed is 20 per cent vaporised Mole fraction in vapour Mole fraction in liquid 1 0.78 0.581 0.411 0.258 0.130 1 0.90 0.777 0.632 0.456 0.261 0