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

(1) S = nRln(pf/pi)               

(2) S = nRln(pi/pf)

(3) S = nRTln(pf/pi)             

(4) S = RTln(pf/pi)

Subtopic:  Spontaneity & Entropy |
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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 |
To view explanation, please take trial in the course below.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology