# Calculations using Born-Haber cycles

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##### Intros

##### Examples

###### Lessons

**Construct a Born-Haber cycle to find the lattice energy of compounds.**

The table below^{1,2}shows some enthalpy terms for the ionic compound CaF_{2}in kJ mol^{-1}.

**Enthalpy term****Value (kJ mol**^{-1})$\triangle H$

_{at}(Ca)178

$\triangle H$

_{at}(F)77.5

1

^{st}ionization energy, Ca589.7

2

^{nd}ionization energy, Ca1145

1

^{st}electron affinity, Cl-322

$\triangle H$

_{f}(CaF_{2})-1219.6

Use this data to construct a Born-Haber cycle and find the lattice energy of CaF_{2}in kJ mol^{-1}.