Which equation represents the bond enthalpy for the H–Br bond in hydrogen bromide?

A.     \({\text{HBr(g)}} \to {\text{H(g)}} + {\text{Br(g)}}\)

B.     \({\text{HBr(g)}} \to {\text{H(g)}} + {\text{Br(l)}}\)

C.     \({\text{HBr(g)}} \to {\text{H(g)}} + \frac{1}{2}{\text{B}}{{\text{r}}_2}({\text{l)}}\)

D.     \({\text{HBr(g)}} \to {\text{H(g)}} + \frac{1}{2}{\text{B}}{{\text{r}}_2}({\text{g)}}\)

A