Thermodynamics

• Standard for enthalpy of formation 


  Enthalpy change when one mole of a compound is formed from its constituent elements under standard conditions, all reactants and products are in their standard states
• Standard enthalpy of atomisation

  Enthalpy Change which accompanied the formation of one mole of gaseous atoms from the event bin its standard state under standard conditions
• first ionisation energy

  Standard enthalpy change when one of gaseous atoms is converted into a mole of gaseous ions each with a single positive charge
• First electron affinity

  Standard enthalpy change when a mole of gaseous atoms is converted into a mole of gaseous ions, each with a single negative charge
• Second electron affinity

  Enthalpy change when one mole of electron is added to a mole of gaseous ions each with a single negative charge to form ions each with 2 negative charged
• Lattice formation enthalpy

  Standard Enthalpy change when one mole of solid ionic compound is formed from its gaseous ions under standard condition
• Lattice dissociation Enthalpy

  Standard Enthalpy change when one mole of ionic compound separated into its gaseous ions
• enthalpy of hydration

  Standard enthalpy change when water molecules surround one mole of gaseous ions
• Enthalpy of solution

  Standard enthalpy change when one mole of solute dissolved completely in sufficient solvent to form a solution in which the molecules or ions are far enough apart not to interact with each other.
• mean bond enthalpy

  Enthalpy change when one mole of gaseous molecules each breaks a covalent bond to form 2 free radicals, averaged over a range of compound