Air as an ideal gas with k51.4 enters a converging–diverging duct with a mach number of 2. at the inlet, the pressure is 26 lbf/in.2 and the temperature is 4458r. a normal shock stands at a location in the converging section of the duct, with mx5 1.5. at the exit of the duct, the pressure is 150 lbf/in.2 the flow is isentropic everywhere except in the immediate vicinity of the shock. determine temperature, in 8r, and the mach number at the exit

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?