Question: Helium gas is compressed steadily from 90 kPa and 25C to 600 kPa at a rate of 2 kg/min by an adiabatic compressor. If the

Helium gas is compressed steadily from 90 kPa and 25°C to 600 kPa at a rate of 2 kg/min by an adiabatic compressor. If the compressor consumes 70 kW of power while operating, the isentropic efficiency of this compressor is
(a) 56.7%
(b) 83.7%
(c) 75.4%
(d) 92.1%
(e) 100.0%

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