Calculate the isentropic efficiency of a continuous flow adiabatic compressor that compresses 20.0 lbm/min of a constant specific heat ideal gas.
The test data for this compressor are inlet state = 1.00 atm and 25.0°C; outlet state = 1.00 MPa and 350.°C; cp = 1.00 KJ/(kg · K), R = 0.250 kJ/(kg · K). The isentropic efficiency of a compressor is defined as