Question: Air at 1 4 4 0 oR , 4 0 0 lbf / in 2 expands isentropically in a piston - cylinder assembly to a

Air at 1440 oR,400 lbf/in2 expands isentropically in a piston-cylinder assembly to a pressure of 20 lbf/in . Determine the temperature, in F, at the end of the process and the work, Btu/lb, during the process.

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