INTERMOLECULAR FORCES AND INTERACTION ENERGY 



237 



Table 6-10 

 Variation of Potential Energy with Distance between Molecules 



" The interaction energy is given in kcal/mole and was calculated from the following 

 equations: 



4.39x108 2.347x102 



Hj: (p = 



N^: (p = 



CO^: (p = 

 CH,: 99 = 



cZi2 d^ 



5.46 Xl0« 2.174x103 



1.625x10' 7.042 xlO^* 



1.86x10' 6.077x103 



d^' 



d" 



Table 6-11 

 Energy Constants for Xonpolar Molecules " 



" The values of A and B obtained from diffraction data are given in the first two 

 columns and are used for the calculation of the total interaction energy q}g. The cal- 

 culated values for A and B were obtained from Eq. 6-42 and the relationship A = 

 Bdg^/2 when a = 12 and b = 6 and are shown to illustrate the accuracy of the approx- 

 imate ecjuation. 



