a column at 101 kpa is to separate 30 kg/h of a bubblepoint solution of benzene and toluene containing 0.6 mass-fraction toluene into an overhead product of 0.97 mass-fraction benzene and a bottoms product of 0.98 mass-fraction toluene at a reflux ratio of 3.5. the feed is sent to the optimal stage, and the reflux is at saturation temperature. determine:
