Isentropic process means a constant __________ process.

A. Enthalpy

B. Pressure

C. Entropy

D. None of these

Answer: Option C

Solution(By Examveda Team)

Isentropic process is the process where entropy(s) remains constant. So, $$ds = 0$$
Generally, $$ds$$ $$ = \frac{{\delta Q}}{T}$$   for reversible process, so for reversible adiabatic process $$ds = 0$$
Hence, reversible adiabatic process is called isentropic process.