Calculations using Born-Haber cycles
Intros
Examples
Lessons
- Construct a Born-Haber cycle to find the lattice energy of compounds.
The table below1,2 shows some enthalpy terms for the ionic compound CaF2 in kJ mol-1.
Enthalpy term
Value (kJ mol-1)
at (Ca)
178
at (F)
77.5
1st ionization energy, Ca
589.7
2nd ionization energy, Ca
1145
1st electron affinity, Cl
-322
f (CaF2)
-1219.6
Use this data to construct a Born-Haber cycle and find the lattice energy of CaF2 in kJ mol-1.