A binary liquid mixture of benzene and toluene is in equilibrium with its vapour at a pressure of 1.5 atm. The liquid mole fractions of benzene and toluene are equal. Show that vapour-liquid equilibrium occurs at a temperature of
379.6 K and calculate the corresponding mole fractions of benzene and toluene in the vapour phase. You may assume ideal solution behaviour.
Antoine’s coefficients for toluene: A = 16.014 , B = 3094.5 , C = -53.75
Antoine’s coefficients for benzene: A = 15.901, B = 2788.5, C = -52.34
These Antoine coefficients are based on pressure in torr, temperature in K, and
natural logarithms.
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