Definitions of enthalpy change

Descriptions of the different typed of enthalpy changes. 

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  • Created by: mitchell
  • Created on: 25-01-13 21:09
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  • Enthalpy Change
    • The standard enthalpy of formation is the enthalpy change when one mole of a compound is formed from its elements under standard conditions in their standard states
    • The lattice formation enthalpy is the standard enthalpy change when one mole of solid ionic compound is formed from its gaseous ions
    • The first ionisation energy is the standard enthalpy change when one mole of gaseous atoms is converted into a mole of gaseous ions each with a single positive charge
    • The standard enthalpy of atomisation is the enthalpy change which accompanies the formation of one mole of gaseous atoms from the element in its standard state under standard conditions
    • The first electron affinity is the standard enthalpy change when a mole of gaseous atoms is converted to a mole of gaseous ions, each with a single negative charge.

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