2.56 A gas within a piston-cylinder assembly undergoes a thermo- dynamic cycle consisting of three processes: Process 1-2: Constant volume V = 1 m, p = 1 bar, to p2 = 3 bar, U- U = 400 kJ. Process 2-3: Constant pressure expansion to V3 = 2 m. Process 3-1: Adiabatic compression, with W31 = -1120 kJ. There are no significant changes in kinetic or potential energy. De- termine the net work for the cycle, in kJ, and the heat transfers for Processes 1-2 and 2-3, in kJ. Is this a power cycle or refrigeration cycle? Explain.