Q20 · CSIR NET Chemistry, June 2018
Paper: CSIR NET June 2018 · Subject: Physical Chemistry · Chapter: Thermodynamics · Topic: Laws State Functions · Marks: 2 · Difficulty: Easy
The change in entropy for a reversible adiabatic process is
(a)Maximum
(b)Minimum
(c)Zero
(d)Positive
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
Reversible adiabatic: dq_rev = 0, so dS = dq_rev/T = 0 — an isentropic process.
Study loop for Thermodynamics