For a sample of a perfect gas when its pressure is changed isothermally from Pi to Pf, the entropy change is given by:

1. s=nR In pfpi

2. s=nR In pipf

3. s=nRT In pfpi

4. s=RT In pipf

Subtopic:  Spontaneity & Entropy |
 70%
From NCERT
NEET - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh
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