Thermodynamic cycle is defined as a process in which a working fluid undergoes a series of state changes
and finally returns to its initial state. A cycle plotted on any diagram of properties forms a closed curve.
A reversible cycle consists only of reversible processes. The area enclosed by
the curve plotted for a reversible cycle on a p-v diagram represents the net work of the cycle.
The work is done on the system, if the state changes happen in an anticlockwise manner.
The work is done by the system, if the state changes happen in a clockwise manner.
