Carnot engine operating between 775 0K and 305 0K produces 54 kJ of work. Determine (a) QA, (b) S during heat rejection, and (c) thermal efficiency.

In a piston cylinder system, a fluid at 0.8 bar occupying 0.07 m³ is compressed reversibly to a pressure of 10.2 bar and specific volume of 0.6 m³/kg according to the law p = c. The fluid then expands reversibly according to the law pv² = c to 1.1 bar. A reversible cooling at constant volume then restores the fluid back to initial state. Calculate the net work for the process in Joules. To 3 d.p. and insert the unit symbol joules.

Define reversible work, which is the maximum useful work that can be obtained as a system undergoes a process between two specified states.

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