mass transfer

b) 500kgmol/hr of an equimolar counter mixture of pentane and hexane is fed to the distillation column at operates at approximately 1atm, the feed is a saturated liquid. It is necessary to produce distillate and bottom streams containing 95mol% pentane and 95mol% hexane. The distillation column contains a partial reboiler and a total condenser and operates at 1.5 times the minimum reflux ratio, Constant molal overflow can be assumed. Answer the following questions (the attached diagram may be of some use). i. Determine the exit flow rates of D \& W in kgmol/hr. ii. Determine the minimum reflux ratio (Rmin). What is the value of (R/Rmin) ? iii. Determine the number of theoretical stages (N) required for the operation at 1.5 times the minimum. iv. What is the optimal feed plate location? v. Locate the point corresponding to the composition of liquid and vapor streams passing each other between stages 2 and 3 from the top