Chemistry Enthalpy of vapourisation for water is 186.5kJ mol–1. The entropy change during vapourisation is __ kJK–1mol–1

 Enthalpy of vapourisation for water is 186.5kJ mol–1. The entropy change during vapourisation is __ kJK–1mol–1

  1. A

    0.5

  2. B

    1.0

  3. C

    1.5

  4. D

    2.0

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    Solution:

    Delta {S_{Vapourization}} = frac{{Delta {H_{Vap}}}}{{B.P}} = frac{{186.5KJ}}{{373K}} = 0.5KJ/mole/K

     

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