1). A solution of organic colloids in water is to be concentrated frome: 30 Minutes evaporator, Steam is available at 120C. A pressure of 102 from 8 to 45 percent solids in an vapor space. The feed rate to the evaporator is 2000kg/hr at 51.7C. If is to be maintained in the 353K and the overall heat transfer coefficient is 2605kg/hr at 51.7C. If the product is collected at transfer area required. 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