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Question 31041
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Kinetic Theory and Thermodynamics: Work in Processes MCQ

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Work in ProcessesEasyQuestion 31041

Question

Work done by an ideal gas during isothermal expansion from V₁ to V₂ at temperature T is:
  1. A
    nRT ln(V₂/V₁)
    Correct
  2. B
    nR(T₂−T₁)
  3. C
    P(V₂−V₁)
  4. D
    nCvΔT

Correct answer

nRT ln(V₂/V₁)

Explanation

Isothermal: W = ∫(nRT/V)dV = nRT ln(V₂/V₁). Since T = const, PV = const and pressure varies.

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