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1. The feed of 350 kg mole/h C6H6+C7H8 contains 40% (mole fraction) C6H6 into distillation tower, the operating pressure of distillation tower is 1atm, the top product contains C6H6 97% (mole fraction), the bottom product contains C6H6 2% (mole fraction) fraction), and the reflux ratio is 1.4 RD min, if the bubble point of the feed is 950C, and the heat of evaporation of C6H6 is 7360cal/g mole, C7H8 is 7960cal/g mole Try to calculate the following problems (a) D, B? kg mole/h (b) total then Distillation tower needs some ideal stages? (c) (i) if feed is saturated liquid (ii) feed temperature 20°C and CPL=0.44cal/g-oC (iii) feed q=1/3, then distillation tower each Need some ideal stage(d) need some steam at the reboiler with 20lb/in2gauge pressure (e) need some cold water at the condenser cold water inlet 250C and outlet 400C?< The equilibrium concentration of C6H6+C7H8 at 1 atm is X(C6H6) 1 0.78 0.581 0.411 0.258 0.13 0 Y(C6H₁) 1 0.9 0.777 0.632 0.465 0.261 0