AP Chemistry
6.8 Enthalpy of Formation
6.6 Introduction to Enthalpy of Reaction
\[ \text{CH}_3\text{OH}(l) + \dfrac{3}{2}\text{O}_2(g) \rightarrow \text{CO}_2(g) + 2\,\text{H}_2\text{O}(l) \quad \Delta H^\circ = -726\text{ kJ/mol}_{\text{rxn}} \]
The combustion of methanol, \(\text{CH}_3\text{OH}(l)\), is represented by the thermochemical equation above. Based on the standard enthalpies of formation, \(\Delta H^\circ_f\), provided in the table, what is the standard enthalpy of formation of \(\text{CH}_3\text{OH}(l)\)?
| Substance | \(\Delta H^\circ_f\ (\text{kJ/mol})\) |
|---|---|
| \(\text{CO}_2(g)\) | \(-394\) |
| \(\text{H}_2\text{O}(l)\) | \(-286\) |
The combustion of methanol, \(\text{CH}_3\text{OH}(l)\), is represented by the thermochemical equation above. Based on the standard enthalpies of formation, \(\Delta H^\circ_f\), provided in the table, what is the standard enthalpy of formation of \(\text{CH}_3\text{OH}(l)\)?
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