Chemistry - Enthalpy definitions 0.0 / 5 ? ChemistryEnthalpyA2/A-levelAQA Created by: NashaanCreated on: 12-05-13 19:11 Lattice Dissociation Standard enthalpy change to seperate one mole of an ionic solid into gaseous ions 1 of 6 Lattice Formation Standard enthalpy change for the formation of one mole of ionic solid from its gaseous ions 2 of 6 Enthalpy of formation The enthalpy change when one mole of substance is formed from its elements under standard conditions with all substances in their standard states 3 of 6 Enthalpy of atomisation The standard enthalpy change when one mole of gaseous atoms is formed from the element in its standard state 4 of 6 Ionisation enthalpy (first) X(g) --> X+(g) + e- 5 of 6 Electron affinity The standard molar enthalpy change when one mole of gaseous atoms each gain an electron 6 of 6
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