onsider an ionic compound, MX3, composed of generic metal M and generic gaseous halogen X. The enthalpy of formation of MX3 is Δ?∘f =−583 kJ/mol. The enthalpy of sublimation of M is Δ?sub =161 kJ/mol. The first, second, and third ionization energies of M are IE1=643 kJ/mol, IE2=1715 kJ/mol, and IE3=2623 kJ/mol. The electron affinity of X is Δ?EA =−329 kJ/mol. (Refer to the hint). The bond energy of X2 is BE =193 kJ/mol. Determine the lattice energy of MX3.

Introduction to Chemical Engineering Thermodynamics
8th Edition
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Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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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 Δ?∘f =−583 kJ/mol.

  • The enthalpy of sublimation of M is Δ?sub =161 kJ/mol.

  • The first, second, and third ionization energies of M are IE1=643 kJ/mol, IE2=1715 kJ/mol, and IE3=2623 kJ/mol.

  • The electron affinity of X is Δ?EA =−329 kJ/mol. (Refer to the hint).

  • The bond energy of X2 is BE =193 kJ/mol.

Determine the lattice energy of MX3.

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