a) a feed mixture of ethanol and water is 40 mole $ ethanol. the feed is at 200 degrees C and is at a high enough pressure that it is a liquid. It is input into the column through a valve, where it flashes. Column pressure is 1 kg/cm^2. Find the slope of the feed line.
b) We are separating ethanol and water is a distillation column at a pressure of 1 kg/cm^2. Feed is 50 wt % ethanol, and feed rate is 1 kg/hr. The feed is initially a liquid at 250 degrees C and then flashes when the pressure is dropped as it enters the column. Find q.