Consider the following thermochemical equation: C (s) + O2 (g) → CO2 (g) ΔH = - 393 kJ CO (g) + ½O2 (g) → CO2 (g) ΔH = - 294 kJ What is the enthalpy change for the following related thermochemical equation C (s) + ½O2 (g) → CO (g) Group of answer choices a. - 687 kJ b. - 99 kJ c. + 99 kJ d. + 687 kJ
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