The Born-Haber cycle

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Hess' Law states that if a reaction can occur by more than one route, the total change in enthalpy remains the same, as long as the initial and final conditions are the same.

(http://upload.wikimedia.org/wikipedia/commons/a/af/BornHaberLiF.PNG)

This is a Born-Haber cycle, and uses Hess' law to indirectly calculate the lattice enthalpy of a compound by working with known enthalpy changes.

  • Start- the Datum line. This is the starting point, and shows the elements in the ionic compound in their standard states with zero energy
  • Route 1- the standard enthalpy of formation for the ionic compound, Lithium fluoride. This is an exothermic process, so goes down…

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geology wizard


thank you!, the step by step is vey useful :)

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