c) A chemical engineering lecturer performed a flash distillation experiment for his students. A 10kmol/h liquid feed mixture which consisted of 20mol% ethanol and 80mol% water at latm was used. While the lecturer was able to determine that 30mol% of the feed vaporized in a small flash drum, he lacked the equipment to measure the liquid and vapour compositions. Equilibrium data for the ethanol/water system is given by y = 5x i) Determine the liquid and vapour compositions ii) Calculate the percent ethanol recovery in the vapour stream. [6 marks) 13 marks]