Sodium carbonate monohydrate (Na2CO3H2O) is crystallized from 35.5%w/w saturated solution at 100C via (a) cooling and (b) evaporation. Saturated solution is fed to the crystallizer at a rate of 100 kg/h. Both processes are operated at steady state. (Molecular weight of Na2CO3 is 106) (a) For crystallization by cooling, calculate the production rate of crystals (Na2CO3H2O) if the saturated solution is cooled down to 25C where the solubility of Na2CO3 is 27.4gNa2CO3/100g H2O (8 marks) (Ans: 21.875kg/hr ) (b) For crystallization by evaporation, calculate the amount of water evaporated at 100C in order to produce the same amount of crystal (Na2CO3H2O) with cooling process in (a). (7 marks) (Ans: 30.81kg/hr)