5. Distillation is used to separate pentane from hexane. The feed amounts 100 mol/s and has a mole ratio of pentane/hexane = 0.5. The bottom and top products have the compositions XB= 0.05 and Xp= 0.98. The reflux ratio is 2.25. The column pressure is 1 bar. The feed, at the bubbling point, enters the column exactly on the feed tray. The tray temperature is equal to the feed temperature. The pentane vapor pressure is given by pf = exp(11- (1 - 1280) ) (bar) (1 atm = 1.013 bar) T(K The vapor pressure of hexane is 1/3 of the pentane vapor pressure over the whole temperature range. The average density of liquid pentane and hexane amounts to 8,170, respectively, 7,280 mol/m3. The heat of vaporization amounts to 30 kJ/mol. The distance between the trays amounts to 0.50 m. a. Calculate the feed temperature. b. Calculate the vapor stream from the reboiler. c. Construct the y-x diagram. d. Construct the operating lines and locate the feed line. e. Determine the number of equilibrium stages