A 5 wt% sulfuric acid aqueous solution at 40oF is to be concentrated to 50 wt% by evaporation of water . The concentrated solution and water vapor emerge from evaporator at 180oF and 1 atm. Calculate the rate at which heat must be transferred to process 100 lb/h of the feed solution. The enthalpy of water vapor at 180oF and 1 atm relative to liquid water at 32oF is 1138 Btu/lb.
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