Consider an ionic compound, MX, composed of generic metal M and generic, gaseous halogen X.
The enthalpy of formation of MX is ?HfÂ° = â559 kJ/mol. The enthalpy of sublimation of M is ?Hsub = 105 kJ/mol. The ionization energy of M is IE = 487 kJ/mol. The electron affinity of X is ?HEA = â349 kJ/mol. (
Refer to the hint). The bond energy of X2 is BE = 209 kJ/mol.
Determine the lattice energy of MX.

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Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X.

The enthalpy of formation of MX2 is ÎHfÂ° = â883 kJ/mol. The enthalpy of sublimation of M is ÎHsub = 123 kJ/mol. The first and second ionization energies of M are IE1 = 665 kJ/mol and IE2 = 1397 kJ/mol. The electron affinity of X is ÎHEA = â313 kJ/mol. (Refer to the Hint). The bond energy of X2 is BE = 157 kJ/mol.

Determine the lattice energy of MX2.

_____KJ/mol