Moving to the next question prevents changes to this answer. Question 1 Wash-oil containing 6.67 mol% benzene is fed to a 0.85m diameter stripper at 298 K and 1 atm. Benzene-free steam flows to the tower countercurrently and is used to recover 90% of the benzene by using a steam rate 1.75 times the minimum steam rate. A solute-free wash-oil flow rate of 1700 g/s will be used. Determine the height of the stripper in ft. Under the given operating conditions, the overall mass transfer capacity coefficient is equal to 8 mol/m³.s.AXA. Molecular weight of the wash-oil is 0.26 kg/mol. The equilibrium data for the benzene-wash oil-steam system are as follows: X 0 0.0175 0.036 0.057 0.078 0.1 0.12 0.14 Y 0 0.093 0.169 0.267 0.42 0.458 0.533 0.628 31.493 ft 4.949 ft 12.885 ft 25.0785 ft 8.602 ft 17.697 ft 21.251 ft