Air, which may be considered as a mixture of 79 percent N2 and 21 percent O2 by

Question:

Air, which may be considered as a mixture of 79 percent N2 and 21 percent O2 by mole numbers, is compressed isothermally at 200 K from 4 to 8 MPa in a steady-flow device. The compression process is internally reversible, and the mass flow rate of air is 2.9 kg/s. Determine the power input to the compressor and the rate of heat rejection by treating the mixture
(a) As an ideal gas and
(b) As a non-ideal gas and using Amagat€™s law.

Air, which may be considered as a mixture of 79