Lattice energy is defined as the energy
Correct answer: C. released when one mole of an ionic crystal is formed from its gaseous ions
- A. needed to melt one mole of an ionic solid
- B. needed to vaporise one mole of a liquid
- C. released when one mole of an ionic crystal is formed from its gaseous ions
- D. absorbed when an electron is added to a gaseous atom
Explanation
Bringing gaseous ions together into an ordered lattice releases a large amount of energy, so lattice energy is strongly exothermic and is a direct measure of the strength of the ionic bonding. It cannot be measured directly and is obtained instead from a Born Haber cycle using Hess's law. Energy absorbed when an electron is added to a gaseous atom is electron affinity.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Lattice Energy
Lattice energy describes the energy released when gaseous ions form one mole of an ionic solid, or the energy required to separate that solid into gaseous ions, depending on the convention used. Its value depends mainly on ionic charge and radius and is calculated through Born-Haber cycles.
Practise Solids
357 free Solids MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.