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Question 31045
JEE Physics · Medium

Kinetic Theory and Thermodynamics: Work in Processes MCQ

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Work in ProcessesMediumQuestion 31045

Question

Work done against constant atmospheric pressure P₀ when liquid of volume V vaporises (vapour volume V_g >> V_l):
  1. A
    P₀V_g
  2. B
    P₀(V_g − V_l)
    Correct
  3. C
    0
  4. D
    P₀V_l

Correct answer

P₀(V_g − V_l)

Explanation

W = P₀ΔV = P₀(V_gas − V_liquid). Since V_g >> V_l, W ≈ P₀V_g.

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