What is the entropy change (in $\mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ ) when one mole of ice is converted…
What is the entropy change (in $\mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ ) when one mole of ice is converted into water at $0^{\circ} \mathrm{C}$ ?
(The enthalpy change for the conversion of ice to liquid water is $6.0 \mathrm{~kJ} \mathrm{~mol}^{-1}$ at $0^{\circ} \mathrm{C}$ )
20.13
2.013
2.198
21.98
Solution
$\mathrm{S}=\frac{q_{r e v}}{\mathrm{~T}}=\frac{6000}{273}$
$=21.978=21.98 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}.$