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  • Question
  • The entropy change involved in the isothermal reversible expansion of 2 moles of an ideal gas from a volume of 10 dm3 at 27°C is to a volume of 100 dm3


  • Options
  • A. 42.3 J/ mole / K
  • B. 38.3 J/ mole / K
  • C. 35.8 J/ mole / K
  • D. 32.3 J/ mole / K

  • Correct Answer
  • 38.3 J/ mole / K 

    Explanation

    ? s = n R ln v 2 v 1  

    = 2 . 303   n R   log v 2 v 1  = 2 . 303 × 2 × 8 . 314 × log 100 10  =  38 . 3   J   m o l - 1 k - 1

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