Chemistry - Thermochemistry Question with Solution | TestHub

Based on the following reactions
C(graphite)$+{\mathrm{O}}_2\left(\mathrm{g}\right)\to \mathrm{C}{\mathrm{O}}_2\left(\mathrm{g}\right);\mathrm{\Delta }\mathrm{H}=-394$KJ/mol …(i)
$2\mathrm{C}\mathrm{O}\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2\mathrm{C}{\mathrm{O}}_2\left(\mathrm{g}\right);\mathrm{\Delta }\mathrm{H}=-569$KJ/mol …(ii)
The heat of formation of CO will be