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Crystal Lattice and Unit Cell

What is latti...

Question

What is lattice enthalpy of an ionic crystals? Give the relation.

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Solution

Lattice energy is the energy released when on mole of an ionic crystal is formed from one mole of their constituent ions . Greater the value of lattice energy, more stable is the ionic compound. The lattice energy of sodium chloride is -185 kcal/mole. The negative sign indicates that the process is exothermic process and that the energy of the system is lowered as the ionic solid is formed.

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