H$_2$O($\ell$) $\rightleftharpoons$ H$_2$O(v), $\Delta S > 0$. Expansion of gas at constant temperature, $\Delta S > 0$. Sublimation of solid to gas, $\Delta S > 0$. For 2H(g) $\rightarrow$ H$_2$(g), $\Delta S < 0$ because $\Delta n_g < 0$.