born håber cycles
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define lattice enthalpy
the energy released when one mole of an ionic solid compound in its standard state is formed from its constituent gaseous ions starting infinitely far apart
define enthalpy of formation
enthalpy change when 1 mole of a substance is formed from its elements in their standard states under standard conditions 298K 100 KPa
define enthalpy of atomisation
energy required to produce 1 mole of gaseous atoms from the element in its standard state 100KPa 298K
define first electron affinity
energy required to produce 1 mole of gaseous ions with a 1- charge by adding 1 mole of electrons to one mole of gaseous atoms
define first ionisation energy
energy required to remove one mole of electrons from one mole of gaseous atoms
define second ionisation energy
energy required to remove one mole of electrons from one mole of gaseous 1+ ions to form one mole of 2+ ions
what is a born haber cycle
an enthalpy cycle/hess cycle composed of all the enthalpy changes in the steps involved in the formation of 1 mole of ionic compound from its constituent elements in their standard states.