Air enters a steady flow adiabatic compressor at Pi = 100 kPa and T = 300 K and is compressed to Pe = 650 kPa. The isentropic efficiency of the compressor is n = 80%. Power input to the compressor is 20 kW. Assuming that air is an ideal gas with specific heats varying with temperature, determine:
a) The exit temperature of air in °C
b) Mass flow rate of air in kg/s
c) Rate of change of entropy of air during the compression process in kJ/kg-K
d) Entropy generation during the compression process.
Note: Use the ideal gas model with specific heats varying with temperature (Table A-17).
The diagram is on the next page.