Q20 · CSIR NET Chemistry, December 2018
Paper: CSIR NET December 2018 · Subject: Physical Chemistry · Chapter: Gaseous State · Topic: Gaseous State – General · Marks: 2 · Difficulty: Easy
Entropy of a perfect gas is
(a)independent of V
(b)proportional to V
(c)proportional to $\ln \mathrm{V}$
(d)proportional to $\mathrm{V}^{2}$
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
For a perfect gas S = nC_V ln T + nR ln V + const, so the entropy varies as ln V (Sackur–Tetrode).
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