Air enters an adiabatic nozzle at 180°F, 30 psia, and 4 ft/s. The air exits at 400 ft/s. The mass flow rate of the air is 1.2 lbm/s. The surface of the nozzle is maintained at 200°F. (a) Determine the exit pressure if the nozzle is reversible. (b) Plot the entropy generation rate for exit pressures ranging from 10 psia to 29 psia.
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