R1.2 (AHL) Standard enthalpy changes & Born-Haber cycle
This AHL page effectively builds on Hess's law, firstly by using standard enthalpies of combustion and formation in thermodynamic calculations, and then by applying the law to the formation of ionic compounds using Born-Haber cycles. These show the enthalpy changes of individual steps in the formation of an ionic solid from its elements in their standard states. They can then be used to interpret and determine values...