$18 \ g$ of ice is converted into water at $0 \ ^\circ C$ and $1 \ atm$. The entropies of $H_2O_{(s)}$ and $H_2O_{(l)}$ are $38.2$ and $60 \ J/mol \ K$ respectively. The enthalpy change for this conversion is ..... $J/mol$.

When a solid is converted into liquid,entropy

For the reaction: $H^{+}_{(aq)} + OH^{-}_{(aq)} \rightarrow H_{2}O_{(l)}$,given the standard molar entropies $S^{o}(298 \ K)$ in $J \ K^{-1} \ mol^{-1}$ as $S^{o}(H^{+}) = 0$,$S^{o}(OH^{-}) = -10.7$,and $S^{o}(H_{2}O) = 70$. The standard entropy change $\Delta S^{o}$ for the reaction is ..... $J \ K^{-1} \ mol^{-1}$.

The enthalpy change for the transition of liquid water to steam at $373 \, K$ is $40.8 \, kJ \, mol^{-1}$. What is the $\Delta S$ for the process in $J \, K^{-1} \, mol^{-1}$?

For the reaction $NH_4Cl_{(s)} \rightarrow NH_{3(g)} + HCl_{(g)}$,the entropy change is ...... .

What is the entropy of vaporisation of water at $100\,^{\circ}C$,if the molar heat of vaporisation is $9710\,cal/mol$?