1. Benzene and toluene form an ideal solution at all proportion. The vapor pressure of pure benzene and pure toluene at 25 oC are 95.1 and 28.4 mmHg, respectively. What is the vapor pressure of a solution that contains 50.0 g benzene (mw 78.11) and 50.0 g toluene (mw 92.13)? What is the composition of the vapor that is in equilibrium with the above benzene-toluene solution at 25 oC?


2. Styrene (C8H8) and ethylbenzene (C8H10) form ideal mixture. If a mixture is composed of 38% styrene and 62% ethylbenzene, by mass, at 90oC, what is the composition of the vapor in equilibrium with the liquid mixture. The vapor pressure of styrene and ethylbenzene at 90oC are 134 mmHg and 182 mmHg, respectively.​