enthalpy definitions

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  • Created by: Tom
  • Created on: 28-01-14 19:04
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  • Enthalpy change definitions
    • Formation
      • Enthalpy change when one mole of a substance is formed from its constituent elements in their standard states
    • Combustion
      • Enthalpy change when one mole of a substance undergoes complete combustion under standard conditions
    • Ionisation
      • 1st: The FIE is the enthalpy change when one mole of gaseous atoms loses one electron per atom to produce one mole of gaseous 1+
      • 2nd: when one mole of gaseous 2+ ions is produced from one mole of gaseous 1+ ions
    • Electron affinity
      • The enthalpy change when one mole of gaseous atoms gains one electron per atom to produce gaseous 1- ions
    • Atomisation
      • enthalpy change when one mole of gaseous atoms is produced from an element in its standard state
    • lattice
      • when one mole of a solid ionic compound is formed from its constituent elements

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