\[ \begin{array}{l} \text { Calculate the standard enthalpy of form...
0\[
\begin{array}{l}
\text { Calculate the standard enthalpy of formation of } \mathrm{CH}_{3} \mathrm{OH}(\mathrm{l}) \text { from the following } \\
\text { data: } \\
\mathrm{CH}_{3} \mathrm{OH}(\mathrm{l})+\frac{3}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) ; \Delta_{r} \mathrm{H}^{\ominus}=-726 \mathrm{~kJ} \mathrm{~mol}^{-1} \\
\mathrm{C} \text { (graphite })+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g}) ; \Delta_{\mathrm{c}} \mathrm{H}^{\ominus}=-393 \mathrm{~kJ} \mathrm{~mol}^{-1} \\
\mathrm{H}_{2}(\mathrm{~g})+\frac{1}{2} \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \mathrm{H}_{2} \mathrm{O}(\mathrm{l}) ; \Delta_{\mathrm{f}} H^{\ominus}=-286 \mathrm{~kJ} \mathrm{~mol}^{-1} \text {. }
\end{array}
\]
W.
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