The enthalpy of reaction for the combustion of C to CO2 is -393.5 kJ/mol of C, and the enthalpy for the combustion of CO to CO2 is -566.0 kJ/mol :
C(s) + O2(g) → CO2(g) ΔH1 = -393.5 kJ
2 CO(g) + O2(g) → 2 CO2(g) ΔH2 = -566.0 kJ
Using these data, calculate the enthalpy (kJ) for the combustion of C to CO:
Do not include the units in your answer but do include the correct sign before your numerical value.
C(s) + 1/2 O2(g) → CO(g) ΔH3 = ?