90 percent of the n-butane is to be recovered by simple distillation from a mixture containing 20 mol % n-butane and 80 mol% n-pentane. Determine for 100 kmol of feed: (a) the amount of pentane...

90 percent of the n-butane is to be recovered by simple distillation from a mixture containing 20 mol % n-butane and 80 mol% n-pentane. Determine for 100 kmol of feed: (a) the amount of pentane distilled. (b) the composition of the residue. Solve analytically using an average a value of 3.5