alleryLattice enthalpy is the energy required to separate one mole of an ionic solid into:
AGranular ions
BGuarded ions
CGaseous ions
DGrouped ions
Answer & Solution
Correct answer: C. Gaseous ions
1. The definition specifies a final state, not just separation.
2. The ions must end up free and far apart.
3. Lattice enthalpy is the energy required to separate one mole of a solid ionic compound into gaseous constituent ions.
4. So the answer is gaseous ions.
_Source: syllabus Chemistry Part I, Unit 4 'Chemical Bonding and Molecular Structure'_
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