Average bond energies ( ): C–H 413, C–Cl 327, Cl–Cl 243, H–Cl 431

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

Problem

Average bond energies (

\text{kJ mol}^{-1}

): C–H 413, C–Cl 327, Cl–Cl 243, H–Cl 431. Calculate the enthalpy change,

\Delta H

, for the reaction

\mathrm{CH_4(g) + Cl_2(g) \rightarrow CH_3Cl(g) + HCl(g)}

. Report your answer to the nearest

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