Definations of Enthalpy Changes 0.0 / 5 ? ChemistryEnthalpyASEdexcel Created by: BCreated on: 08-12-13 20:15 Standard Enthalpy Change of Combustion the enthalpy change that happens when 1 mole of the substance is completely burnt in oxygen under standard condtions 1 of 6 Standard Enthalpy Change of Formation the enthalpy change when 1 mole of the compound is formed from its elements under standard conditions 2 of 6 Standard Enthalpy Change of Atomisation the enthalpy change when 1 mole of an elements atoms in the gaseous state is formed from the element under standard conditions 3 of 6 Standard Enthalpy Change of Neutralisation the energy change when an acid and a base react to form 1 mole of water under standard conditions 4 of 6 Bond Dissociation Enthalpy the energy needed to break a particluar covalent bond, or the energy released when the bond is formed 5 of 6 Mean Bond Enthalpy the mean (average) value of the bond dissociation enthalpy of a particular type of bond over a wide range of different compounds 6 of 6
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