Question
Given
| (A) | $\mathrm{2CO(g)+O_2(g)\to 2CO_2(g)}$ | $\mathrm{\Delta H_1^0=-x~kJ~mol^{-1}}$ | |
|---|---|---|---|
| (B) | $\mathrm{C(graphite)+O_2(g)\to CO_2(g)}$ | $\mathrm{\Delta H_2^0=-y~kJ~mol^{-1}}$ |
$\mathrm{\Delta H^0}$ for the reaction
$\mathrm{C(graphite)+\frac{1}{2}O_2(g)\to CO(g)}$ is :