Air is to be heated steadily by an 8-kw electric resistance heater as it flows through an insulated duct. if the air enters at 54°c at a rate of 2 kg/s, determine the exit temperature of air. solve using appropriate software.

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?