A liquid stream containing 50.0 mole% benzene and the balance toluene at 25°C is fed to a continuous single-stage evaporator at a rate of 1320 mol/s. The liquid and vapor streams leaving the evaporator are both at 65°C. The liquid contains 42.5 mole% benzene and the vapor contains 73.5 mole% benzene. Calculate the heating requirement for this process in kW.