The lattice energy of NaF is experimentally determined to be −923 kJ mol⁻¹
CHEMISTRY · Single correct · A Level · Chemistry · Bonding · Bonding
Problem
The lattice energy of NaF is experimentally determined to be −923 kJ mol⁻¹. Predict qualitatively how the lattice energy would change if Na⁺ were replaced by Cs⁺ to form CsF, and choose the best explanation.
(a) It would increase, because the greater molar mass of CsF results in stronger ionic bonds
(b) It would stay approximately the same, because the ionic charges are still +1 and −1
(c) It would decrease, because the larger Cs+ ion increases the separation between the ions
(d) It would increase, because the lower ionization energy of Cs makes the cation more attracted to F−