Given the thermochemical equations: C(graphite) + O 2(g) rightarrow CO 2(g), Delta H circ = -393.5 kJ/mol CO(g) + 1/2O 2(g) rightarrow CO 2(g), Delta H circ = -283.0 kJ/mol What is the standard enthalpy of formation of CO(g)?

Given the thermochemical equations:
$C (graphite) + O_{2} (g) \to C O_{2} (g), Δ H^{\circ} = - 393.5 kJ/mol$
$CO (g) + \frac{1}{2} O_{2} (g) \to C O_{2} (g), Δ H^{\circ} = - 283.0 kJ/mol$
What is the standard enthalpy of formation of $CO (g)$ ?

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