Refrigerant-134a enters an adiabatic compressor as saturated vapor at 120kPa at a rate of 0.3m3/min and exits at 1-MPa pressure. If the isentropic efficiency of the compressor is 80 percent, determine the following: (a) the temperature of the refrigerant at the exit of the compressor (b) the power input in kW. A Carnot engine has 1kg of air as the working fluid. Heat is supplied to the air at 800K and rejected by the air at 300K. At the beginning of the heat addition process the pressure is 0.8MPa and during this process the volume triples. Assuming constant specific heats, calculate a) The net cycle work. b) The amount of work done in the isentropic expansion process. c) The entropy change during the heat addition process. d) The entropy change during the heat rejection process