An engine operates in a Carnot cycle. At point A in the cycle,
2.34 mol of a monatomic ideal gas has a pressure of 1,400 kPa, a
volume of 10.0 L, and a temperature of 720 K. The gas expands
isothermally to point B and then expands adiabatically to point C,
where its volume is 24.0 L. An isothermal compression brings it to
point D, where its volume is 15.0 L. An adiabatic process returns
the gas to point A....