Chem flashcards 0.0 / 5 ? ChemistryEnthalpyA2/A-levelAQA Created by: Billy JobsonCreated on: 31-10-23 23:51 Standard molar enthalpy of formation enthalpy of reaction for the formation of one mole of a compound from its constitutive elements in their standard states 1 of 12 Standard molar enthalpy of combustion enthalpy change when 1 mole of a substance burns completely in oxygen 2 of 12 Standard enthalpy of atomisation the enthalpy change when 1 mol of an element in its standard state is atomised to produce 1 mol of gaseous atoms 3 of 12 First ionisation energy The energy required to remove the outermost electron from an atom of a neutral element 4 of 12 Second ionisation energy the energy required to remove the outermost, or least bound, electron from a 1+ ion of the element 5 of 12 First electron affinity The energy released when 1 mole of gaseous atoms each acquire an electron to form 1 mole of gaseous -1 ions 6 of 12 Second electron affinity the energy required to add an electron to each ion in 1 mole of gaseous 1- ions to produce 1 mole of gaseous 2- ions 7 of 12 Lattice enthalpy of formation the enthalpy change when 1 mole of solid crystal is formed from its separated gaseous ions. Lattice formation enthalpies are always negative 8 of 12 Lattice enthalpy of dissociation the enthalpy change needed to convert 1 mole of solid crystal into its scattered gaseous ions 9 of 12 Mean bond enthalpy the enthalpy change needed to break the covalent bond into gaseous atoms, averaged over different molecules 10 of 12 Enthalpy of solution the change in enthalpy that results when 1 mol of solute (component 1) is dissolved in a solvent (component 2) 11 of 12 Enthalpy of hydration the enthalpy change when one mole of gaseous ions is dissolved in water to give one mole of aqueous ions and a solution of infinite dilution 12 of 12
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