Sun May 01, 2011 By:

Q. What are dispersion forces?Why are dispersion forces weaker than hydrogen bonding?

Expert Reply
Sun May 01, 2011
Dispersion forces are between non-polar molecules. The London dispersion force is the weakest intermolecular force.
The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. This force is sometimes called an induced dipole-induced dipole attraction. London forces are the attractive forces that cause nonpolar substances to condense to liquids and to freeze into solids when the temperature is lowered sufficiently.
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