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AP EAMCET201824 Apr 2018Morning ShiftChemistryThermodynamics (C)Actual

If 1.5 ~L of an ideal gas at a pressure of 20 ~atm expands isothermally and reversibly to a final volume of 15 ~L , the work done by the gas in L atm is

Options

  1. A69.09
  2. B34.55
  3. C− 34.55
  4. D−69.09

Correct answer

D. −69.09

Step-by-step solution

Given, aligned & p₁=20 ~atm & V₁=1.5 ~L & V₂=15 ~L aligned At constant temperature, aligned p₁ V₁ & =p₂ V₂=n R T W & =-n R T in ( V₂ V₁ ) & =-2.303 20 1.5 ( 15 1.5 ) & =-69.09 ~L ~atm aligned

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