Use the Born–Haber cycle and data from Appendix IIB, Chapter 9, and this chapter to calculate the lattice energy of KCl. (ΔH_sub for potassium is 89.0 kJ/mol.)

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Substance Aluminum Al(s) Al(g) Al³+(aq) AlCl3(s) Al₂O3(s) Barium Ba(s) Ba(g) Ba²+(aq) BaCO3(s) BaCl₂(s) BaO(s) Ba(OH)₂(s) BaSO4(s) AH (KJ/mol) AG (kJ/mol) S°(J/mol.K) 0 330.0 -538.4 -704.2 -1675.7 0 180.0 -537.6 -1213.0 -855.0 -548.0 -944.7 -1473.2 0 289.4 -483 -628.8 -1582.3 0 146.0 -560.8 -1134.4 -806.7 -520.3 -1362.2 28.32 164.6 -325 109.3 50.9 62.5 170.2 9.6 112.1 123.7 72.1 132.2 Substance Beryllium Be(s) BeO(s) Be(OH)₂ (s) Bismuth Bi(s) BiCl3(s) Bi₂O3(s) Bi₂S3(s) Boron B(s) B(g) BCl3(g) BF3(g) B₂H6(g) AH (kJ/mol) AG (kJ/mol) S°(J/mol. K) 0 -609.4 -902.5 0 -379.1 -573.9 -143.1 0 565.0 -403.8 -1136.0 36.4 0 -580.1 -815.0 0 -315.0 -493.7 -140.6 0 521.0 -388.7 -1119.4 87.6 9.5 13.8 45.5 56.7 177.0 151.5 200.4 5.9 153.4 290.1 254.4 232.1