An engineer proposes to have a heat engine that will receive heat from a source at 1000 k and reject heat to a sink at 400 k. the heat engine will produce 500 kw of power aft er receiving 750 kw of heat. this process is possible. a)- true b) false

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?