Arefinery in northwest pennsylvania produces asphalt as an important product that brings revenue, particularly during the summer months. in late fall this refinery switches operations to produce more fuel oil from vdr for the coming winter months, producing still some asphalt, but in lower quantity. explain which of the following switches will take place in the refinery in late fall, and why?

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?