Question

Standard Enthalpy (Heat) of formation of liquid water at $25^{\circ} C$ is around
$H _{2}(g)+\frac{1}{2} O _{2}(g) \longrightarrow H _{2} O (l)$

• A. -237 kJ/mol
• B. 237 kJ/mol
• C. - 286 kJ/mol
• D. 286 kJ/mol

Answer 1

Answer: (C)

$\left(\Delta H_{f}^{\circ}\right)_{\text {water }}=-286 kJ / mol$