2). 3980 kilograms per hour of steam is supplied to an evaporator at 120C.1.25 kilogram per second of feed solution enters into an evaporator at 291K. Calculate the enthalpy of product in kJ/kg, if the steam economy is 0.848 and the enthalpy of vapor is 2600.4kJ/kg. Take enthalpy of feed solution is 75.58kJ/kg. Calculate heat transfer area required if overall heat transfer coefficient