Thermodynamics: definitions Flashcards
standard enthalpy of formation
standard enthalpy change for the formation of 1 mole of compound formed from its constituent elements in standard states under standard conditions of 100 kPa and 298K
enthalpy of hydration
standard enthalpy change for the hydration of 1 mole of gaseous ions`
electron affinity
standard enthalpy change when 1 mole of gaseous ions is made from 1 mole of gaseous species
1st electron affinity
standard enthalpy change when 1 mole of gaseous 1- ions made from 1 mole of gaseous atoms
2nd electron affinity
standard enthalpy change when 1 mole of gaseous 2- ions made from 1 mole of gaseous 1- ions
enthalpy change
measure of heat change at constant pressure
standard enthalpy change
energy given out/ taken in during a chemical/physical change under standard conditions
enthalpy of solution
standard enthalpy change for the complete dissolution of 1 mole of solute in sufficient solvent to form a solution which all the ions/molecules are separated not to interact
enthalpy of atomisation
standard enthalpy change for the formation of 1 mole of gaseous atoms from the element in its standard states under standard conditions
what are the two forms of lattice enthalpy?
- lattice enthalpy of formation
- lattice enthalpy of dissociation
lattice enthalpy of formation
standard enthalpy change when 1 mole of solid ionic compound is formed from its gaseous ions
lattice enthalpy of dissociation
standard enthalpy change when 1 mole of solid ionic compound is dissociated into its gaseous ions
bond dissociation enthalpy
standard enthalpy change for breaking covalent bonds in 1 mole of gaseous molecules to form 1 mole of gaseous free radicals
ionisation energy
standard enthalpy change for the removal of 1 mole of electrons from 1 mole of gaseous atoms
