The average Xe - F bond energy is 34 kcal/moI, first I.E. of Xe is 279 kcal/mol, electron affinity of F is 85 kcal/mol & bond dissociation energy of F2 is 38 kcal/moI. Then, the enthalpy change for the reactionXeF4⟶Xe−+F−+F2+ will be