A2 Thermodynamics definitions Flashcards
Enthalphy of formation
when 1 mole of a substance / compound is formed from its constituents states in standard state and conditions
enthalphy change of combustions
when one mole of a molecule is fully combusted by oxygen in their standard states
enthalphy change of neutralisation
when 1 mole of water is formed in a neutralisation reaction in their standard states and conditions
enthalpy change of 1st ionisation
when one mole of gaseous atoms form one mole of gaseous 1+ ions in standard conditions
enthalpy change of 2nd t ionisation
when one mole of gaseous ions (1st) form one mole of gaseous 2+ ions in standard conditions
enthalpy change of 3rd ionisation
when one mole of gaseous 2+ ions form one mole of gaseous 3+ ions in standard conditions
electron affinity
1st
when one mole of gaseous atoms form one mole of 1- ions
2nd
when one mole of gaseous -1 ions form one mole of 2- ions
enthalpy of atomisations
enthalphy change of when one mole of gaseous is produced from an element in its standard states
hydration enthalpy
when one mole of gaseous ions become hydrated by water
enthalphy of solutions
enthalphy change when one mole of ionic solids dissolve in an amount of water large enough to dissolved ions are well separated to not interact no more
bond dissociations
enthalphy change when one mole of covalent bonds are broken in their gaseous states
lattice enthalphy of formations
enthalphy change when one mole of of solid ionic compounds is formed from into its constituents ions in the gas phase
lattice enthalphy of dissociations
when one mole of solid ionic compounds is broken into its consituent states
enthalphy of vaporisation
when one mole of liquid is turn into a gas
enthalphy of fusion
when one mole of solid it turn into a liquid
