<P> Because the net variation in state properties during a thermodynamic cycle is zero, it forms a closed loop on a PV diagram . A PV diagram's Y axis shows pressure (P) and X axis shows volume (V). The area enclosed by the loop is the work (W) done by the process: </P> <Dl> <Dd> (1) W = ∮ P d V (\ displaystyle (\ text ((1))) \ qquad W = \ oint P \ dV) </Dd> </Dl> <Dd> (1) W = ∮ P d V (\ displaystyle (\ text ((1))) \ qquad W = \ oint P \ dV) </Dd> <P> This work is equal to the balance of heat (Q) transferred into the system: </P>

Which of the following is the true for a thermo dynamic cyclic process