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Calculate overall energy changes (in kilojoules per mole) for the formation of CaCl from the elements

Calculate overall energy changes (in kilojoules per mole) for the formation of CaCl from the elements. The following data are needed: Eea for Cl= -348.6 kJ/mol Ei1 for Ca= +589.8 kJ/mol Ei2for Ca= +1145 kJ/mol Heat of sublimation for Ca= +178.2 kJ/mol Bond dissociation energy for Cl2= +243 kJ/mol Lattice energy for CaCl2= +2258 kJ/mol Lattice energy (estimated) for CaCl= +717 kJ/mol ΔEf = __________ kJ/mol