Question: An air compressor is used to charge an initially empty 7-ft3 tank with air up to 750 lbf/in 2. The air inlet to the compressor

An air compressor is used to charge an initially empty 7-ft3 tank with air up to 750 lbf/in 2. The air inlet to the compressor is at 14.7 lbf/in 2, 60 F and the compressor isentropic efficiency is 80%. Find the total compressor work and the change in energy of the air.

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