Question

LiCl and CaO have similar bond lengths of 230 pm and 238 pm, respectively. The lattice energy of LiCl is –852 kJ/mol. Select the approximate expected lattice energy of CaO.

Group of answer choices

–852 kJ/mol

–3410 kJ/mol

–426 kJ/mol

–213 kJ/mol

–1700 kJ/mol

Answer 1

The lattice energy of an ionic compound is roughly proportional to the electrostatic attractive force between the oppositely charged ions of the compound.

The electrostatic attractive force or yhe Coulomb's force F is given by