Question

A gas is allowed to expand reversibly unc adiabatic conditions. What is zero for such a proces

• A. ΔT
• B. ΔG
• C. ΔS
• D. None of these

Answer 1

Answer: (C)

ΔS

Answer 2

For a reversible adiabatic process, there is no heat transfer (q = 0) and the process is isentropic, meaning the change in entropy is zero (ΔS = 0). Temperature (ΔT) may change during the process, and ΔG (change in Gibbs free energy) is not necessarily zero.

Reversible adiabatic process ⟹ isentropic ⟹ ΔS = 0.