At 100 °C, the vapor pressures of benzene and toluene are 1,200 mmHg and 490 mmHg, respectively. Answer the questions below when it becomes 1 atm of benzene and toluene at 100°C.
(1) Find the mole fractions of benzene in the gas phase and in the liquid phase.
(2) What is the specific volatility?
(3) Express the relationship between the liquid phase composition and the gas phase composition as the mole fraction of the liquid phase (x) and the gas phase (y).