Use the Born-Haber Cycle to Calculate the Lattice Energy of KCl(s)

question 38

Multiple Choice

Use the Born-Haber cycle to calculate the lattice energy of KCl(s) given the following data: $\Delta$ H(sublimation) K = 79.2 kJ/mol
I₁ (K) = 418.7 kJ/mol
Bond energy (Cl-Cl) = 242.8 kJ/mol
EA (Cl) = 348 kJ/mol
$\Delta{H}^{\circ}_f$ (KCl(s) ) = -435.7 kJ/mol

• A) -165 kJ/mol
• B) 288 kJ/mol
• C) 629 kJ/mol
• D) 707 kJ/mol
• E) 828 kJ/mol

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