Elisabeth W.

asked • 11/20/15

chemistry enthalpy question

Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X.
 
The enthalpy of formation of MX2 is ΔHf° = –861 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 151 kJ/mol. The first and second ionization energies of M are IE1 = 665 kJ/mol and IE2 = 1402 kJ/mol. The electron affinity of X is ΔHEA = –333 kJ/mol. The bond energy of X2 is BE = 191 kJ/mol.
 
Determine the lattice energy of MX2.
 

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