Thermodynamic Aspects of Compound Formation

The reaction of a metal, M, with a non-metallic element, E, to form a binary compound, ME., is summarized in equation 3.1  

In addition, if n is not equal to 1, the total bond dissociation enthalpy. E BDE(E ), required to convert E into E g), will have to be included. The atoms of will then need to be ionized to absorbing the 

These gaseous ions may then condense to form a solid releasing 

An example of a Born-Haber cycle calculation is provided by the formation of Fisiure 3.2. 

An ion in a cry stal lattice lies in an electrostatic field createri l )y all the surr i, ag layers of counter . s icC liku ions. This field will df I I upon tfie exact geometric sk acture r f the lattice It is this which determine s ttie various, distaiii-us th - lon 

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