申論題

4. It is necessary to determine the vapor-liquid equilibrium composition for designing a separation process for a binary mixture of perfluoro-n-heptane and n-heptane at 25 ℃ At this temperature, the vapor pressure of pure perfluoro-n-heptane is 0.1101 bar, and the vapor pressure of pure n-heptane is 0.0601 bar.

(a) (6%) Calculate the composition of the vapor in equilibrium with a liquid containing 60 mol % perfluoro-n-heptane and 40 mol % of n-heptane at 25℃ and 0.6 bar, assuming the solution is ideal.