Question

A heat engine, based on diatomic molecules, can be made based on just 2 processes.  Suppose the cycle begins at a pressure of 3 atm and a volume of 0.01 m³.  It moves on the PV diagram following a straight line until it doubles in volume. Then it returns to the starting point following an isothermal path.  If there is 0.5 moles of gas, fill in the state table and the process table.  Now, which of the following temperatures would work as the hot reservoir (700 K, 727 K, or 800 K)?  Which of the following could serve as the cold reservoir (700 K, 727 K, or 800 K)? Lastly find the change in entropy of the universe for one full cycle of the engine.

Answer 1