The Born–Fajans–Haber cycle uses thermodynamic cycles to determine lattice energy. An alternative to the Born–Fajans–Haber method is one based on fundamental principles. Because the dominant interactions in an ionic crystal are Coulomb interactions, we can use the theory of electrostatics to calculate the lattice energy. Kapustinskii used these ideas and proposed the following equation: 

where the number of ions per formula unit is given by ν and r₀ is equal to the sum of the ionic radii, r₊ + r_- (pm) . Use the equation to complete the following table:

Transcribed Image Text:

u 120,250 v Z+Z r 0 1 – 34,5) (kJ IT 0 (kJ mol-¹)