A heat engine operates under the following thermodynamic cycle:A→B: isobaric expansion(P=const.)B→C: isochoric cooling(V=const.)C→A: isothermal compression(T=const.)The engine is operated by nmoles of oxygen, a diatomicgas which behaves like an ideal gas without any appreciable vibrational kinetic energy.The thermodynamic cycle described by the gas is entirely defined by pressures PAand PC, and volume VA. Assume that PC=PA/2and give all your answers in terms of n, R, PAand VA. b)Sketch the cycle on a P-Vdiagram and determine all the unknown pressures, volumes and temperatures. c)Determine the efficiency of this engine, defined by e =Wnet/Qin.Wnetis the net work done by the gas over a full cycle and Qinis the total heat that flows into the gas.Be careful, Qindoes not include the heat released by the gas.

A heat engine operates under the following thermodynamic cycle:A→B: isobaric expansion(P=const.)B→C: isochoric cooling(V=const.)C→A: isothermal compression(T=const.)The engine is operated by nmoles of oxygen, a diatomicgas which behaves like an ideal gas without any appreciable vibrational kinetic energy.The thermodynamic cycle described by the gas is entirely defined by pressures PAand PC, and volume VA. Assume that PC=PA/2and give all your answers in terms of n, R, PAand VA. b)Sketch the cycle on a P-Vdiagram and determine all the unknown pressures, volumes and temperatures. c)Determine the efficiency of this engine, defined by e =Wnet/Qin.Wnetis the net work done by the gas over a full cycle and Qinis the total heat that flows into the gas.Be careful, Qindoes not include the heat released by the gas.