An equimolar liquid mixture of toluene (C7H8) and hexane (C6H14) at 30C is fed to a distillation column with flowrate of 250 mol/h. The temperature of the distillation column is heated up and maintained at 82C. The process occurs at pressure of 1 atm. The top product with flowrate of 140 mol/h consists of 88 mole% of C6H14. Determine the heat rate (kJ/h) that must be supplied to the column. (Use liquid at 30C and 1 atm as the reference state). [22 Marks] [CLO3, PLO3, C3]