5.30. An inventor has devised a complicated nonflow process in which 1 mol of air is the working fluid. The net effects of the process are claimed to be: A change in state of the air from 250C and 3 bar to 80C and 1 bar. The production of 1800 J of work. The transfer of an undisclosed amount of heat to a heat reservoir at 30C. Determine whether the claimed performance of the process is consistent with the sec- ond law. Assume that air is an ideal gas for which Cp=(7/2)R