Air enters a diffuser operating at steady state at 540°r, 15 lbf/in.2, with a velocity of 600 ft/s, and exits with a velocity of 60 ft/s. the ratio of the exit area to the inlet area is 10. assuming the ideal gas model for the air and ignoring heat transfer, determine the temperature, in °r, and pressure, in lbf/in.2, at the exit.

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.