An ideal gas within a piston-cylinder assembly undergoes a Carnot refrigeration cycle, as shown in the figure below. The isothermal compression occurs at 325 K from 2 bar to 6 bar. The isothermal expansion occurs at 250 K. Determine: P TH Tc 2 p-v diagram for a Carnot gas refrigeration or heat pump cycle. (a) the coefficient of performance, (b) the heat transfer to the gas during the isothermal expansion, in kJ per kmol of gas, (c) the magnitude of the net work input, in kJ per kmol of gas.