1. The feed to a depropanizer operating at 250 lbf/in2 abs contains 6% ethane, 41% propane, 28% i-butane, 23% n-butane and 2% n-pentane (all in mole percent). Considering ideal solution behavior and that Dalton's and Raoult's laws apply: (a) Determine the bubble point temperature and dew point temperature. b) If half vaporizes, psi = 0.5, what is the equilibrium T? c) What is the composition of each stream when psi = 0.5? d) What is the percent recovery for each component when psi = 0.5? e) If a 70% mol recovery of propane in the vapor is desired, what equilibrium temperature is required?