Methane is compressed in a steady-state adiabatic compressor (87% efficient) to 0.4 MPa. What is the required work per mole of methane in kJ? If the flow is to be 17.5 kmol/h, how much work must be furnished by the compressor (in kW)? What is the rate of entropy generation (in kJ/K/h)? 

(a) The inlet is at 0.1013 MPa and -240°F; 

(b) The inlet is 0.1013 MPa and 200 K.