As head separations engineer at BP, you are designing a distillation process to separate toluene and benzene. Your initial feed stream has a flowrate of 350 kmol/hr and is 45 mol% benzene. The feed stream is a bubble point mixture. You need to achieve a distillate that is 3 mol% toluene and a bottoms that is 98 mol% toluene. The column available to you has a total condenser. The VLE data for the mixture is give below. (Hint: You can solve this graphically or analytically. If using an analytical approach, determine the average relative volatility from the data below.)

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.