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Consider an ionic compound, MX3, composed of generic metal M and generic gaseous halogen X. The enthalpy of formation of MX3 is Δ𝐻∘f=−699 kJ/mol. The enthalpy of sublimation of M is Δ𝐻sub=121 kJ/mol. The first, second, and third ionization energies of M are IE1=675 kJ/mol, IE2=1621 kJ/mol, and IE3=2743 kJ/mol. The electron affinity of X is Δ𝐻EA=−317 kJ/mol. The bond energy of X2 is BE=151 kJ/mol. Determine the lattice energy of MX3.