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Calculate the kmol/h of distillate and bottoms being collected, and the number of theoretical trays needed?

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A liquid mixture of benzene and toluene is to be distilled in a fractionating tower at 1 atm pressure. The feed of 100kmol/h is liquid containing 45 mol% benzene and 55 mol% toluene and enters at 327.6 K. A distillate containing 95 mol% benzene and 5 mol% toluene and bottoms containing 10 mol% benzene and 90 mol% toluene are to be obtained. The reflux ratio is 4:1. The average heat capacity of feed is 159 kJ/kmol.K, and the latent heat of vaporization is 32099 kJ/kmol. Equilibrium data are given. Calculate the kmol/h of distillate and bottoms being collected, and the number of theoretical trays needed?

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