7-96E Helium gas is compressed from 14 psia and 70°F to 120 psia at a rate of 5 ft3/s. Determine the power input to the compressor, assuming the compression process to be a) isentropic, b) polytropic with n = 1.2, c) isothermal, and d) ideal two-stage polytropic with n = 1.2. | |
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