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Enthalpy of Formation
Enthalpy change when one mole of substance is formed from its constituent elements with all substances in their standard states
Enthalpy of Combustion
Enthalpy change when one mole of a substance is completely burned in oxygen with all substances in standard states under standard conditions
Enthalpy of Neutralisation
Enthalpy change when one mole of water is formed in a reaction between an acid and an alkali under standard conditions
(Enthalpy of) First Ionisation Energy
Enthalpy change when one mole of gaseous atoms loses one electron to form one mole of gaseous 1+ ions
(Enthalpy of) Second Ionisation Energy
Enthalpy change when each ion in one mole of 1+ ions loses one electron to form one mole of gaseous 2+ ions
(Enthalpy of) First Electron Affinity
Enthalpy change when each atom in one mole of gaseous atoms gains one electron to form one mole of gaseous 1- ions
(Enthalpy of) Second Electron Affinity
Enthalpy change when each ion in one mole of gaseous 1- ions gains one electron to form one mole of gaseous 2- ions
Enthalpy of Atomisation
Enthalpy change when one mole of gaseous atoms is produced from an element in its standard state
Enthalpy of Hydration
Enthalpy change when one mole of gaseous ions become hydrated (dissolved in water to form a dilute solution)
Enthalpy of Solution
Enthalpy change when one mole of an ionic solid dissolves in an amount of water large enough to form a dilute solution.
Bond Dissociation Enthalpy
Enthalpy change when one mole of covalent bonds is broken in the gaseous state
Lattice Formation Enthalpy
Enthalpy change when one mole of a solid ionic compound is formed from its constituent ions in the gas phase
Lattice Dissociation Enthalpy
Enthalpy change when one mole of a solid ionic compound is broken up into its constituent ions in the gas phase
Mean Bond Enthalpy
The average value of the bond dissociation enthalpy for a given type of bond taken from a range of different compounds.
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