thermodynamics definitions

enthalpy chance of formation, is the enthalpy change when 1 mole of a compund is fromed from its constituent elements under standard conditions 

the bond disociation enthalpy, is the enthalpy change when all the bonds of the same type in 1 mole of gaseous molecules are broken

enthalpy of atomisation of an element, is the enthalpy change when 1 mole of gaseouse atoms is formed from an element in its standared state

enthalpy change of atomisation of a compound, is the enthalpy change when 1 mole of gaseous atoms is formed from a compound in its standard state

the 1st ionisation enthalpy, is the enthalpy change when 1 mole of gasous 1+ ions is formed from 1 mole of gaseous atoms

the 2nd ionisation energy, is the enthalpy change when 1 mole of gasous 2+ ions is formed from 1 mole of gaseous atoms

the 1st e- affinity, is the enthalpy change when 1 mole of gaseous 1- ions are made from 1 mole of atoms

the 2nd e- affinity, is the enthalpy change when 1 mole of gaseous 2- ions aremade from 1 mole of atoms

the enthalpy change of hydration, is the enthalpy change when 1 mole of aqueous ions is formed from gaseous ions

the enthalpy change of solution, is the enthalpy change when 1 mole of solute is desolved in sufficient solvent that no further enthalpy change occurs on further dilution