Answer Happy

Prove equation 16, from 15
Cohesive Energy The cohesive energy of inert gas crystals at absolute zero and at zero pres- sure is obtained by substituting (12) and (14) in (11): 12 Ult= - ve [(12.13()* – (145)(*)] @ U..(R) = 2NE (12.13) (15) R and, at R = Ro. U(R) = -(2.15)(4Ne). --- (16) the same for all inert gases. This is the calculated cohesive energy when the atoms are at rest. Quantum-mechanical corrections act to reduce the binding by 28, 10, 6, and 4 percent of Eq. (16) for Ne, Ar, Kr, and Xe, respectively.