A feed stock available at the rate of 1000 mol/h and consisting of (all in mol %):
20% Propane (C3)
30% Isobutane (i-C4)
20% Isopentane (i-C5)
30% Normal pentane (C5)
is to be separated into two fractions by distillation. The distillate (top product) is to contain all of the propane feed to the unit and 80% of the isopentane fed to the unit. Calculate the complete distillate and bottom analysis.