AQA Chem5: Enthalpy Definitions 3.0 / 5 based on 1 rating ? ChemistryEnthalpyA2/A-levelAQA Created by: annaCreated on: 09-06-13 17:01 Bond Dissociation Enthalpy The energy required to break a covalent bond in a gaseous molecule, normally diatomic 1 of 9 Enthalpy of Atomisation The enthalpy change to form 1 mole of gaseous atoms from an element in its standard state 2 of 9 Enthalpy of Sublimation The enthalpy change to form 1 mole of gaseous atoms from 1 mole of a solid element 3 of 9 Enthalpy of 1st Ionisation Energy The enthalpy change to form 1 mole of gaseous (+1) ions from 1 mole of gaseous atoms 4 of 9 Enthalpy of 1st Electron Affinity The enthalpy change when 1 mole of gaseous negative ions (-1) are formed from 1 mole of gaseous atoms 5 of 9 Lattice Association Enthalpy The enthalpy change when 1 mole of an ionic lattice is formed from its ions in a gaseous state 6 of 9 Lattice Dissociation Enthalpy The enthalpy change when 1 mole of an ionic lattice dissociates to form its ions in a gaseous state 7 of 9 Enthalpy of Hydration The enthalpy change when 1 mole of aqueous ions are formed from gaseous ions 8 of 9 Enthalpy of Solution The enthalpy change when 1 mole of solute is dissolved in sufficient solvent that no further enthalpy change occurs on further dilution 9 of 9
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