MCQ
One mole of ice is converted into water at $1$ $atm$ & $273\, K$. The entropies of $H_2O(s)$ and $H_2O(l)$ are $38.2$ and $60.01\, J\, mol^{-1} \,K^{-1}$ respectively the enthalpy change for the conversion is ......$J \,mol^{-1}$
  • A
    $59.54$
  • $5954$
  • C
    $595.4$
  • D
    $320.6$

Answer

Correct option: B.
$5954$
b
$\mathrm{H}_{2} \mathrm{O}(\mathrm{s}) \longrightarrow \mathrm{H}_{2} \mathrm{O}(\ell)$

$\Delta \mathrm{S}=60.01-38.2=\frac{\Delta \mathrm{H}}{273}$

$\Delta \mathrm{H}=5954.13 \,\mathrm{J} \,\mathrm{mole}^{-1}$

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