ChemistryCode 9701
Lattice energy and Born-Haber cycles
What this topic asks you to be able to do
- define the following terms and use them: (a) enthalpy change of atomisation, ΔHat (b) lattice energy, ΔHlatt (for gaseous ions coming together as a solid lattice)
- define first electron affinity, EA, and use this term correctly
- account for the influences on the electron affinities of elements
- describe and explain the trends shown by electron affinity in Group 16 and in Group 17
- construct a Born–Haber cycle for an ionic solid, and use it
- carry out Born–Haber cycle calculations
- explain qualitatively how the size of a lattice energy depends on ionic charge and on ionic radius