Use the data given to calculate an overall energy change (in kilojoules per mole) for the formation of CsF2 from its elements.
Eea for F = -328
E11 for Cs = +375.7
E12 for Cs = +2422
Heat of sublimation for Cs = 76.1 KJ/mol
Bond dissociation energy for F2 = +158 KJ/mol
Lattice energy for CsF = +740 KJ/mol.