In a single KF molecule, R0 = 2.67 A. Because ofoverlap repulsion, the cohesive energy (the energy required to split the molecule intoK+ and F- ions) -Ei is 0.50 eV/molecule less than the Coulombattractive energy. Given that the electron anity of uorine is 4.07 eV/electron andthat the ionization energy of potassium is 4.34 eV, show that the energynecessary to separate the molecule into neutral atoms is -0:945Ei. . . .
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