# What is the heat of formation of water in kj/mol?

Jun 30, 2018

Is this not in your text...?

#### Explanation:

We assess the reaction...

${H}_{2} \left(g\right) + \frac{1}{2} {O}_{2} \left(g\right) \rightarrow {H}_{2} O \left(l\right) + \Delta {H}_{\text{rxn}}$

By definition, $\Delta {H}_{\text{rxn}} = \Delta {H}_{f}^{\circ} \left({H}_{2} O\right) = - 285.8 \cdot k J \cdot m o {l}^{-} 1. .$...this is from my text...

....and it relates to ONE mole of the reaction AS WRITTEN....