i and ii

) A liquid mixture of benzene-toluene is to be distilled in a fractioning tower at 101.3 kPa pressure. The feed of 100kgmol/h is liquid and it contains 45mol% benzene and 55mol% toluene and enters at 327.6K(130F). A distillate containing 95mol % benzene and 5mol% toluene and a bottom containing 10mol% benzene and 90 mol% toluene are to be obtained. The reflux ratio is 4:1. The average heat capacity of the feed is 159kJ/kg mol.K (38btu/lb, F). Equilibrium data for the system is given in Table Q4.1. [Campuran cecair benzena-toluena perhu diasingkan di dalam menara pemisah pada tekanan 101.3 kPa. Suapan dimasukkan sebanyak 100kg moljam adalah cecair yang mengandungi 45mol% benzena dan 55mol% toluena dan masuk pada suhu 327.6K(130F). Suatu sulingan yang mengandungi 95 mol \% benzena dan 5mol% toluena dan di bawah mengandungi 10mol% benzena and 90mol% toluena perlu dihasilkan. Nisbah refluks ialah 4:1. Purata kapasiti haba suapan ialah 159kJ/kg mol.K ( 38 btw/b, F). Data keseimbangan diberikan dalam Jadual Q4.1.] Table Q4.1: Vapor-Pressure and Equilibrium-Mole-Fraction data for Benzene- Toluene system. [Jadual Q4.1: Data Tekanan Wap dan Keseimbangan-Mol-Pecahan untuk sistem Bemena-Toluena] (i) Calculate the kg moles per hour distillate and kg moles per hour bottoms. [Kirakan kg mol per jam sulingan dan kg mol per jam di bawah.] (5 Marks/ Markah) (ii) Estimate the number of theoretical trays needed. [Anggarkan jumlah teori dulang yang diperlukan]