Refrigerant 134a enters a heat exchanger operating at steady state as a superheated vapor at 1200 kpa, 60°c, where it is cooled and condensed to saturated liquid at 1200 kpa. the mass flow rate of the refrigerant is 10 kg/min. a separate stream of air enters the heat exchanger at 37°c with a mass flow rate of 80 kg/min. ignoring heat transfer from the outside of the heat exchanger and neglecting kinetic and potential energy effects, determine the exit air temperature, in °c.