Interm olecular Forces

Recall that interm olecular forces are the weak attractive forces that cause molecules to clump together into liquids or solids and keep them from drifting apart and becoming a gas. 

As a second approximation, we can assume ideal gas behavior, in which case there are no interm olecular forces present, and the fugacity of species i is equal to its partial pressure ... 

The volatility of molecular fluorides is due to the absence of interm olecular bonding other than van der Waals forces, since the polarizability of fluorine is very low and no suitable outer orbitals exist for other types of attraction. 

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