Which equation best represents the bond enthalpy of HCl?

A.     ${\text{HCl(g)}} \to {{\text{H}}^ + }{\text{(g)}} + {\text{C}}{{\text{l}}^ - }{\text{(g)}}$

B.     ${\text{HCl(g)}} \to {\text{H(g)}} + {\text{Cl(g)}}$

C.     ${\text{HCl(g)}} \to \frac{{\text{1}}}{2}{{\text{H}}_2}({\text{g)}} + \frac{1}{2}{\text{C}}{{\text{l}}_2}({\text{g)}}$

D.     ${\text{2HCl(g)}} \to {{\text{H}}_2}({\text{g)}} + {\text{C}}{{\text{l}}_2}({\text{g)}}$

B