Enthalpy definitions Flashcards
Enthalpy change of formation
The enthalpy change when one mole of a compound is formed from its constituent elements in their standard states under standard conditions
Bond dissociation enthalpy
The enthalpy change when all the same type of bonds in a mole of gaseous molecules are broken
Enthalpy change of atomisation of an element
The enthalpy change when one mole of gaseous atoms is formed from an element in its standard state
Enthalpy change of atomisation of a compound
The enthalpy change when one mole of a compound in its standard state forms gaseous atoms
First ionisation energy
The enthalpy change when one mole of gaseous atoms forms one mole of gaseous 1+ ions and one mole of electrons
Second ionisation energy
The enthalpy change when one mole of gaseous 1+ ions forms one mole of gaseous 2+ ions and one mole of electrons
First electron affinity
The enthalpy change when one mole of gaseous 1- ions is formed from one mole of gaseous ions and one mole of electrons
Second electron affinity
The enthalpy change when one mole of gaseous 1- ions and one mole of electrons form one mole of gaseous 2- ions
Enthalpy change of hydration
The enthalpy change when one mole of gaseous ions forms one mole of aqueous ions
Enthalpy change of solution
The enthalpy change when one mole of a solute is dissolved in enough solvent that no further enthalpy change occurs on further dilution
Enthalpy change
Heat change under constant pressure
Enthalpy change of lattice formation
The enthalpy change when one mole of a solid ionic compound is formed from its gaseous ions under standard conditions
Enthalpy change of combustion
The enthalpy change when one mole of a substance is burned completely in excess oxygen with all reactants and products in their standard states under standard conditions
Lattice enthalpy of dissociation
The enthalpy change when one mole of a solid ionic compound is completely dissociated into its gaseous ions under standard conditions
