Definitions: Enthalpy 0.0 / 5 ? ChemistryEnthalpyA2/A-levelOCR Created by: h98Created on: 25-11-15 19:33 ionic bonds the electrostatic force of attraction between oppositely charged ions 1 of 10 ΔH formation the enthalpy change when one mole of solic ionic compound is formed from its elements in their standard states under standard conditions 2 of 10 ΔH atomisation the enthalpy change when one mole of gaseous atom is formed from an element in its standard states 3 of 10 1st ionisation energy when one mole of e- are removed from one mole of gasous atoms to form one mole of gaseous +1 ions 4 of 10 2nd ionisation energy when one mole of e- are removed from one mole of singly positive ions (in a gaseous state) 5 of 10 ΔH 1st electron affinity the enthalpy change when one mole of gasous -1 ions are made from one mole of gaseous atoms 6 of 10 ΔH 2nd electron affinity the enthalpy change when one mole of gaseous -2 ions are formed from one mole of gaseous -1 ions 7 of 10 ΔH lattice enthalpy the enthalpy change when one mole of solid ionic compound is formed from its gaseous ions under standard conditions 8 of 10 ΔH hydration the enthalpy change when one mole of aqueous ions are formed from one mole of gaseous ions under standard conditions 9 of 10 ΔH solution the enthalpy change when one mole of solid ionic compound dissolves completely in water under standard conditions 10 of 10
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