The standard enthalpy changes for the combustion of carbon and carbon monoxide are shown below.

$$\begin{array}{*{20}{l}} {{\text{C(s)}} + {{\text{O}}_{\text{2}}}{\text{(g)}} \to {\text{C}}{{\text{O}}_{\text{2}}}{\text{(g)}}}&{\Delta H_{\text{c}}^\Theta = - 394{\text{ kJ}}\,{\text{mo}}{{\text{l}}^{ - 1}}} \\ {{\text{CO(g)}} + \frac{1}{2}{{\text{O}}_2}{\text{(g)}} \to {\text{C}}{{\text{O}}_2}{\text{(g)}}}&{\Delta H_{\text{c}}^\Theta = - 283{\text{ kJ}}\,{\text{mo}}{{\text{l}}^{ - 1}}} \end{array}$$

What is the standard enthalpy change, in kJ, for the following reaction?

$${\text{C(s)}} + \frac{1}{2}{{\text{O}}_2}{\text{(g)}} \to {\text{CO(g)}}$$

A.     –677

B.     –111

C.     +111

D.     +677

B