Question

In a single KF molecule, R₀ = 2.67 A. Because of overlap repulsion, the

cohesive energy (the energy required to split the molecule into K+ and F-

ions) -E_i is 0.50 eV/molecule less than the Coulomb attractive energy.

Given that the electron anity of uorine is 4.07 eV/electron and that the

ionization energy of potassium is 4.34 eV, show that the energy necessary

to separate the molecule into neutral atoms is -0:945Ei.

Answer 1