Three hundred kilograms per hour of air flow through a well-insulated countercurrent heat exchanger as shown below. Two hundred and thirty kilograms per hour of potassium carbonate (K2CO3) aqueous solution are heated by the air. Temperatures of three of the streams are given in the diagram. Calculate the temperature of the exiting potassium carbonate stream using heat capacities to find enthalpies. Assume the heat capacity of the potassium carbonate stream and its molecular weight are equal to that of pure water. Air out 127°C Air in 227°C Heat Exchanger K2CO3 solution in 27°C K2CO3 solution out