Entropy Change
Property diagrams (T-s and h-s diagrams) from the definition of the entropy, it is known that ?Q=TdS during a reversible process. The total heat transfer during this process is given by Qreversible = ? TdS
Therefore, it is useful to consider the T-S diagram for a reversible process involving heat transfer
- On a T-S diagram, the area under the process curve represents the heat transfer for a reversible process