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One mole of an ideal gas is expanded isothermally and reversibly to half of its initial pressure. S for the process in J K ⁻¹ ~mol ⁻¹ is [ 2=0.693 and R=8.314, ~J /( mol K )]

Options

  1. A6.76
  2. B5.76
  3. C10.76
  4. D8.03

Correct answer

B. 5.76

Step-by-step solution

For isothermal process ( T=0) aligned S & =R n P₁ P₂ =8.314 n 2 & =8.314 0.693=5.76 JK ⁻¹ ~mol ⁻¹ aligned

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