The following two reactions occur in sequence during the combustion of graphite: (1)…

CHEMISTRY · Subjective · A Level · Chemistry · Energetics · Energetics

Problem

The following two reactions occur in sequence during the combustion of graphite: (1)

C(\text{s, graphite}) + \frac{1}{2} O_{2}(\text{g}) \to CO(\text{g}) \quad \Delta H_{1} = -110.5\,\text{kJ}

(2)

CO(\text{g}) + \frac{1}{2} O_{2}(\text{g}) \to CO_{2}(\text{g}) \quad \Delta H_{2} = -283.0\,\text{kJ}

Calculate the enthalpy change, in

\text{kJ mol}^{-1}

, for the overall reaction

C(\text{s, graphite}) + O_{2}(\text{g}) \to CO_{2}(\text{g})