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KVPY2013ChemistryThermodynamics (C)

The entropy change in the isothermal reversible expansion of 2 moles of an ideal gas from 10 to 100 ~L at 300 K is

Options

  1. A42.3 JK ⁻¹
  2. B35.8 ~J ~K ⁻¹
  3. C38.3 ~J ~K ⁻¹
  4. D32.3 ~J ~K ⁻¹

Correct answer

C. 38.3 ~J ~K ⁻¹

Step-by-step solution

S = nRT T v ₂ v ₁ = nR v ₂ v ₁ =2.303 nR v ₂ v ₁ =2.303 2 8.314 1=38.3 ~J / k

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