8. Refrigerant-134a enters an insulated diffuser as a saturated vapor at 80°F with a velocity of 800 ft/s. The inlet area is 1.5 in². At the exit, the pressure is 400 lbf/in² and the velocity is negligible. The diffuser operates at steady state

and potential energy effects can be neglected. Determine the mass flow rate, in lb/s, and the exit temperature, in °F. [MO4, MO5]