A feed to a cooling crystallizer is 1000 lb/hr of 32.5 wt% MgSO4 in water 120F. The solution is cooled to 70F to form crystals of heptahydrate. The magma at 70 F consists of crystals of the heptahydrate and mother liquor of 26 wt % MgSO4 . Assume that no water is vaporized. The specific heat of the feed is 0.72 Btu/lbF. The heat of crystallization is - 23.2 Btu/lb of heptahydrate. (MW MgSO4 : 120.5) a) Calculate the yield of crystals b) Estimate the heat removal rate in Btu/hr.