stre 5.7. Fluid 1 enters a counterflow heat exchanger at a temperature of 60°C having . a flow rate of 1.0 kg/s and a c, of 3.2 kJ/(kg K). Fluid 2 enters with a temperature of 20°C having a flow rate of 0.8 kg/s and a c, of 4.0 kJ/(kg K). The UA value of the heat exchanger is 3.0 kW/K. What is the " outlet temperature of Fluid 1?