first ionisation energy
Enthalpy change when 1 mole of gaseous atoms turn into 1 mole of gaseous 1+ ions
first electron affinity
Enthalpy change when 1 mole of gaseous atoms turn into 1 mole of gaseous 1- ions
Enthalpy change of formation
Enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions
enthalpy change of atomisation
enthalpy change when required to produce 1 mole of gaseous atoms
Lattice enthalpy
Enthalpy change when 1 mole of a solid ionic compound is formed from its gaseous ions
Enthalpy change of hydration
Enthalpy change when 1 mole of gaseous ions become aqueous ions
Enthalpy change of solution
Enthalpy change when 1 mole of a solute is dissolved in water