Even more energy is released when the gaseous ions coalesce
into a crystalline solid. Thus….
Li+(g) + F-(g) LiF(s) ˛Holattice of LiF = lattice energy = -1050 kJ
The lattice energy is the enthalpy change that occurs when gaseous
ions coalesce into an ionic solid.
How do we measure lattice energy experimentally? Use
Hess’s law in a Born-Haber cycle
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