Q.1 (5.0 Marks) A binary mixture of n-heptane and n-octane at its boiling point, containing 70 mole % n-heptane, is to be continuously distilled to give a top product of 98 mole % and a bottom product of 1 mole % n-heptane. The reflux ratio is 3.0 and reflux is returned to the column as saturated liquid. The relative volatility of n-heptane to n-octane is 2.0. Using McCabe-Thiele construction, obtain the number of theoretical plates required for this separation. Find the actual number of plates if plate efficiency is 60 %. Calculate the x-y equilibrium diagram using the following equation: y = 1 + (a - 1)x x, y are the molar compositions of n-heptane in liquid and vapour, respectively. a is the relative volatility