Consider the equilibrium data for methanol-water system at 1 bar given in the figure below. 0.9 (0.5, 0.78) 0.8 0.7 0.6 Mole fraction of methanol in vapour, y 0.5 (0.14, 0.5) 0.4 0.3 0.2 0.1 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Mole fraction of methanol in liquid, x A distillation column operating at 1.0 bar is required to produce 92 mol% methanol. The feed is a saturated liquid. It is an equimolar mixture of methanol and water. The minimum reflux ratio is