Acc. to the Born-Haber cycle, ΔE of MgF2 can be estimated as:
ΔE= ΔHsub + IE1+2 + ΔHdiss + 2EA + ΔU
ΔE = 150 + 735 + 1445 + 154 - (2)328 - 2913
Use the following data for magnesium fluoride to estimate ΔE for the reaction:
Mg(s) + F 2 (g) → MgF2 (s) ΔE = ?
Lattice energy -2913 kJ/mol
First ionization energy of Mg 735 kJ/mol
Second ionization energy of Mg 1445 kJ/mol
Electron affinity of F -328 kJ/mol
Bond energy of F2 154 kJ/mol
Energy of sublimation for Mg 150. kJ/mol
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