A air flow with 30 kmol/h flow rate is compressed from P1 = 1.2 bar to P2 = 6.0 bar in a steady-flow compressor. The compressor consumed 100 kW mechanical power. The temperatures and velocities for two states are: T1 = 300 K T2 = 500 K u1 = 10 m/s and u2 = 5 m/s Estimate the rate of heat transfer from the compressor. Assume for air that Cp = 7/2 R and that enthalpy is independent of pressure

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