Enthalpy Change definitions

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  • Created by: Natalie
  • Created on: 13-06-14 18:20
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  • Enthalpy Change
    • Mean bond enthalpy
      • Enthalpy change when one mole of gaseous molecules each breaks a covalent bond to form two free radicals, averaged over a range of compounds
    • Enthalpy of solution
      • Enthalpy change when one mole of solute dissolves completely in sufficient solvent to form a solution in which the molecules or ions are far enough apart not to interact with each other
    • Lattice formation enthalpy
      • Enthalpy change when one mole a solid ionic compound is formed from its gaseous ions
    • First electron affinity
      • Enthalpy change when a mole of gaseous atoms is converted to a mole of gaseous ions, each with a single negative charge
    • Second electron affinity
      • Enthalpy change when a mole of electrons is added to a mole of gaseous ions each with a single negative charge to form ions each with two negative charges
    • Enthalpy of formation
      • Enthalpy change when one mole of a compound is formed from it constituent elements under standard conditions and in standard states
    • First ionisation energy
      • Enthalpy change when one mole of gaseous atoms is converted into a mole of gaseous ions each with a single positive charge
    • Enthalpy of hydration
      • Enthalpy change when water molecules surround one mole of gaseous ions
    • Enthalpy of atomisation
      • Enthalpy change which accompanies the formation of one mole of gaseous atoms from the element in its standard state under standard conditions
    • Lattice dissociation enthalphy
      • Enthalpy change the separate one mole of an ionic lattice into it's gaseous ions
  • Enthalpy of hydration
    • Enthalpy change when water molecules surround one mole of gaseous ions

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