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Energy

Chemistry Unit 2 Module 2

TermDefinition
Enthalpy of formation Enthalpy change of one mole of a substance is formed from its constituent elements with all substances in their standard states
Enthalpy of combustion Enthalpy change of one mole of a substance undergoes complete combustion in oxygen with all substances in their standard states
1st Ionisation enthalpy Enthalpy change when one mole of gaseous atoms loses one electron per atom to produce gaseous 1+ ions
2nd ionisation enthalpy When one mole of gaseous 2+ ions is produced from one mole of 1+ ions
1st electron affinity The enthalpy change when one moe of gaseous atoms gains one electron per atom to produce gaseous 1- ions
2nd electron affinity Enthalpy change when one mole of gaseous 1- ions gains one electron per ion to produce gaseous 2- ions
Enthalpy of atomisation/vaporisation Enthalpy change when one mole of gaseous atoms is produced from an element in its normal state
Hydration enthalpy Enthalpy change when one mole of gaseous ions become hydrated (dissolved in water)
Enthalpy of solution Enthalpy change when one mole of an ionic solid dissolves in an amount of water large enough so that the dissolved ions are well separated and do not interact with each other
Bond dissociation enthalpy Enthalpy change when one mole of covalent bonds is broken in the gaseous state
Lattice enthalpy of formation Enthalpy change when one mole of a solid ionic compound is formed from into its constituent ions in the gas phase
Lattice enthalpy of dissociation Enthalpy change when onle mole of a solid ionic compound is broken up into its constituent ions in the gas phase
Created by: stu033834
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