Question

Define Lattice enthalpy. How is it related to the stability of an ionic compound?

Answer 1

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✍Your answer⬇⬇
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The energy released when the requisite number of positive and negative ions are condensed into crystal to form one mole of the compound is called lattice energy.
OR
It is the energy required to completely separate one mole of a solid ionic compound into gaseous constituents.
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Greater the lattice enthalpy of anionic compound, greater is the stability.
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Answer 2

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☛Lattice enthalpy of an ionic compound is defined as the energy required to completely separate one mole of a solid ionic compound into gaseous constituent ions. More the lattice enthalpy of an ionic compound, stronger the forces of attraction between ions and more stable the compound is.

☛Lattice energy gives us information about the stability of ionic solids by telling us the strength of the forces holding their ions together. It can refer to either the amount of energy required to break an ionic solid into its gaseous ions or the amount of energy released when gaseous ions join to form an ionic solid.