Asoluton of coloidal solufon is b be concentrated rom 15 b 50% solds in a vericatube evaporator. the soluton has a negligible elevafon in boiling point and he specific heat of the feed entering at 15 °c is 0.93. the pressure of the saturated steam bo he evaporatr is 0.8 atm abs; he condenser pressure is 100 mmhg abs. the steam chest has an overal heat transfer coeficient of 1700 wim-k. water must be evaporated at the rate of 25000 kg/hr. how many square meters of surface are required, and what is the steam consumpion in kilograms per hour?