Create the Born-Haber cycle and calculate the lattice energy of lithium chloride (LiCl) from the following data:

Question

Create the Born-Haber cycle and calculate the lattice energy of lithium chloride (LiCl)from the following data:

Quizplus · Accepted Answer

The Born-Haber cycle for the formation of LiCl is as follows:

Li(s) → Li(g) + energy (first ionization energy)
Li(g) → Li+(g) + e- (second ionization energy)
1/2 Cl2(g) → Cl(g) (bond dissociation energy)
Cl(g) + e- → Cl-(g) + energy (electron affinity)
Li(s) + 1/2 Cl2(g) → LiCl(s) + energy (lattice energy)

Using the given values, we can calculate the lattice energy as follows:

ΔH = -519 - 520 + 240 - (-349) - 409
ΔH = -603 kJ/mol

Therefore, the correct choice is C, -846 kJ/mol.

Create the Born-Haber Cycle and Calculate the Lattice Energy of Lithium