5.2.1 Lattice Enthalpy and Born-Haber Cycles Flashcards
What is the Born-Haber cycle?
A cycle showing the thermodynamic steps involved in the formation of an ionic compound from its elements.
What occurs when going from elements in normal states to gaseous atoms?
Atomisation of metal and non-metal.
What occurs when going from elements in normal states to solid ionic compound?
Enthalpy of formation.
What occurs when going from gaseous atoms to gaseous metal ions and electrons and gaseous non-metal atoms?
Ionisation energies of metal atoms.
What occurs when going from gaseous metal ions and electrons and gaseous non-metal atoms to gaseous ions?
Electron affinity of non-metal atoms.
What occurs when going from gaseous ions to solid ionic compound?
Lattice enthalpy of formation.
Define enthalpy of formation.
The enthalpy change when 1 mol of a compound is produced from its elements.
Define ionisation energy.
The energy required to remove an electron from one mole of gaseous atoms.
Define enthalpy of atomisation.
The standard enthalpy change for the formation of one mole of gaseous atoms from the element in it’s normal physical state.
Define electron affinity.
The standard enthalpy change when one electron is gained by an isolated gaseous atom.
Define lattice dissociation enthalpy.
The enthalpy change when one mole of an ionic lattice is separated into its gaseous ions.
Define enthalpy of lattice formation.
The enthalpy change when one mole of an ionic lattice is formed from its gaseous ions
