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Question 31092
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Kinetic Theory and Thermodynamics: Entropy Advanced MCQ

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Entropy AdvancedHardQuestion 31092

Question

Entropy change in reversible isothermal expansion of n moles ideal gas from V₁ to V₂ is:
  1. A
    nR ln(V₂/V₁)
    Correct
  2. B
    nCv ln(V₂/V₁)
  3. C
    nCp ln(V₂/V₁)
  4. D
    Zero

Correct answer

nR ln(V₂/V₁)

Explanation

ΔS = Q_rev/T = W/T = nRT ln(V₂/V₁) / T = nR ln(V₂/V₁).

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