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Q 2. A distillation column is fed with a mixture of benzene and toluene, in which the mole fraction of benzene is 0.35. The column is to yield a product in which the mole fraction of benzene is 0.95, when working with a reflux ratio of 4.0, and the waste from the column containing 0.95 mole percent of toluene. Estimate the number of plates (Use McCabe and Thiele method) required and the position of the feed point, if the feed is (a) saturated vapor and (b) if the feed is liquid at 290 K. Data: For benzene and toluene; Molar latent heat of vaporization is 30 MJ/kmol and specific heat capacity of 1.84 kJ/kgK. The equilibrium relation between the mole fraction of benzene in liquid and in vapour is given by: 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.22 0.38 0.51 0.7 0.63 0.78 y 0.85 0.91 0.96 Marks - 10 [CLO2, PLO2, C4]