This ensures that the complete lattice energy is found, not merely the enthalpy of formation. The energy to break 1 mole of a lattice at the standard temperature and pressure is defined as the standard lattice energy. Chichester: Horwood, 1999. In this case, the **lattice energy definition isn't the change in energy when any two atoms form an ionic bond that is part of an ionic lattice, but instead: The energy required to fully dissociate a mole of an ionic lattice into its constituent ions in their gaseous state. (O) = -141 kJ/mol E.A. 4. { "00:_Front_Matter" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.