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 C

Explanation:

$(\triangle H_{f}^{0})_{water}$ =-286 kJ/mol