The reaction has an enthalpy change of per mole of reaction as written

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

Problem

The reaction

\text{H}_2(g)+\text{Cl}_2(g)\rightarrow 2\,\text{HCl}(g)

has an enthalpy change of

\Delta H= -184\,\text{kJ}

per mole of reaction as written. The average bond energies for

\text{H--H}

and

\text{Cl--Cl}

are

436\,\text{kJ mol}^{-1}

and

243\,\text{kJ mol}^{-1}

, respectively. Determine the average bond energy of the

\text{H--Cl}

bond, in

\text{kJ mol}^{-1}