BCECE Medical BCECE Medical Solved Papers-2010

  • question_answer
    1 g ice absorbs 335 J of heat to melt at \[{{0}^{o}}C\]. The entropy change will be

    A)  \[1.2\,\,J\,{{K}^{-1}}mo{{l}^{-1}}\]  

    B)  \[335\,\,J{{K}^{-1}}mo{{l}^{-1}}\]

    C)  \[22.1\,\,J{{K}^{-1}}mo{{l}^{-1}}\]

    D)  \[0.8\,\,J{{K}^{-1}}mo{{l}^{-1}}\]

    Correct Answer: C

    Solution :

    \[\Delta {{S}_{f}}=\frac{\Delta {{H}_{f}}}{{{T}_{f}}}\]          \[=\frac{(335\times 18)}{273}=22.1\,J{{K}^{-1}}mo{{l}^{-1}}\]


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