11/17/2015 11:00 PM A 6.4/10 11/7/2015 01:01 PM Gradebook Print Calculator Perio

Question

11/17/2015 11:00 PM A 6.4/10 11/7/2015 01:01 PM Gradebook Print Calculator Periodic Table Question 24 of 25 Map A pling Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X. The enthalpy of formation of MX2 is AHl 883 kJ/mol. The enthalpy of sublimation of M is AH 147 kJ/mol. The first and second ionization energies of M are IE 725 kJ/mol and IE 1384 kJ/mol. The electron affinity of X is AHEA 303 kJ/mol. (Refer to the Hint). The bond energy of X2 is B 173 kJ/mol Determine the lattice energy of MX Number AH kJ mol lattice A Previous ® Give Up & View solution Check Answer Next Ext O Hint

Explanation / Answer

Using the Born-Haber cycle,

dHf = dHsub + IE1 + IE2 + BE - 2 x EA + dH(lattice)

with,

dH(lattice) = lattice energy

we get,

-883 = 147 + 725 + 1384 + 173 - 2 x -303 + dH(lattice)

dH(lattice) = -2706 kJ/mol

So the lattice energy calculate dwould be -2706 kJ/mol

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.