The entropy of an adiabatic reversible process is constant, meaning the change in entropy is zero.
Explanation
- In an adiabatic process, there is no heat exchange between the system and surroundings (ΔQ=0\Delta Q=0ΔQ=0).
- For a reversible process, the change of entropy ΔS\Delta SΔS is defined as ΔS=ΔQrevT\Delta S=\frac{\Delta Q_\text{rev}}{T}ΔS=TΔQrev.
- Since ΔQrev=0\Delta Q_\text{rev}=0ΔQrev=0 in an adiabatic reversible process, the entropy change ΔS=0\Delta S=0ΔS=0.
- This type of process is also called an isentropic process, indicating constant entropy.
Thus, the entropy remains unchanged during a reversible adiabatic process.
