1) Standard enthalpy (heat) of formation of liquid water at $25^{0}C$ is around $H_{2} (g)+\frac{1}{2} O_{2}(g) \rightarrow H_{2} O(l) $ A) -237 kJ/mol B) 237 kJ/mol C) -286 kJ/mol D) 286 kJ/mol Answer: Option CExplanation:$(\triangle H_{f}^{0})_{water}$ =-286 kJ/mol
