2.1 Thermochemistry - DEFINITIONS

    Cards (7)

    • Bond enthalpy
      The amount of energy required to break one mole of the stated bond in the gas phase
    • Enthalpy change (ΔH)
      The heat energy change measured under a constant pressure
    • Enthalpy change of reaction
      The enthalpy change when quantities of substances in standard states react completely
    • Enthalpy of combustion
      The enthalpy change when one mole of a substance is burned in excess oxygen
    • Hess's law

      The enthalpy change of a reaction is independent of the route taken
    • Mean bond enthalpy
      The enthalpy change when one mole of a specified covalent bond is broken averaged out across the range of compounds
    • Standard enthalpy of formation (ΔH)
      The enthalpy change when one mole of a substance in its standard state under standard conditions is formed from its elements under standard conditions
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