The reaction has an experimental enthalpy change of

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

Problem

The reaction

\mathrm{HCl(g) + F_2(g) \rightarrow HF(g) + ClF(g)}

has an experimental enthalpy change of

\Delta H = -271\,\text{kJ mol}^{-1}

. Average bond energies (

\text{kJ mol}^{-1}

): H–Cl 431, H–F 567, F–F 159. Using these data, estimate the average bond energy of the Cl–F bond. Report your answer to the nearest

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