Adistillation column is to be used to separate ethane from propane. the distillation column is operated at 400 kpa. a 1000 kmol/h saturated liquid feed stream with 45 mol % ethane and 55 mol% propane is separated to produce a distillate stream with 80% ethane and a bottoms stream with 1% ethane. a total condenser and partial reboiler is used on the distillation column. the reflux ratio is 3. the feed enters the third stage.

a. what are the flowrates of the distillate and bottoms streams (show your

b. what are the operating line equations for the enriching section and the stripping section (show your

c. use the lewis method to calculate the temperature and compositions of the stages above the feed stage