Questions/P Block elements G15-18/Compare the bond dis...
Group 17 ElementsP Block elements G15-18

Compare the bond dissociation enthalpy of F2F_2 and Cl2Cl_2.

Expert Answer

Cl−ClCl-Cl (242.6 kJ mol−1242.6\ kJ\ mol^{-1}) >F−FF-F (158.8 kJ mol−1158.8\ kJ\ mol^{-1}). The F−FF-F bond is weaker due to repulsion between lone pairs on the small F atoms.

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