A reciprocating compressor draws in 500 ft3/min of air whose density is 0.079 lb/ft3, 15 psia, and discharge 80 psia. The increase in specific internal energy is 33.8 BTU/lb and the heat transferred from the air by cooling is 14 BTU/lb. Determine the work in the air in BTU/min and HP. Neglect change in KE.
