Custom Search London Forces or van der Waals Forces Dipole-Dipole Attraction Hydrogen Bonding
Simplified Explanation van der Waals Forces are very weak forces of attraction between molecules resulting from:
****This weak intermolecular attraction is why nonpolar gases in our atmosphere can form liquids under extreme pressure and low temperatures. The more electrons that are present in the molecule, the stronger the dispersion forces will be. Dispersion forces are the only type of intermolecular force operating between non-polar molecules, for example, dispersion forces operate between
Another contribution to chemistry. van der Waals equation Johannes Van der Waals was interested in the kinetic theory of gases and fluids, and his primary work was to develop an equation which applied to real gases, unlike that of Robert Boyle which assumes that there are no attractive forces between molecule and that molecules have zero volume. (P + a/v2)(v-b) = RT , where a and b are constant for a particular gas. Van der Waals was awarded a Nobel prize in 1910 for his work on the equation of state of gases and liquids. The weak, electrostatic attractions between atoms were named Van der Waals forces in his honor. from-http://www.chemsoc.org/timeline/pages/1920.html London Forces or van der Waals Forces Dipole-Dipole Attraction Hydrogen Bonding On to Like Dissolve Like |