intermolecular attractions: attractions between molecules
Post on 12-Feb-2016
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Intermolecular Attractions: Attractions between molecules
Van der Waals Forces• Dipole interactions• Dispersion forces
Hydrogen Bonds
A polar molecule:Water H H
O
A non-polar molecule:CO2
Click on the pictures above to go to a sites that shows a lotof water forming hydrogen bonds
Hydrogen bonds: when hydrogenmakes a weak bond with thenegative pole of other molecules
This picture shows another view of hydrogen bonding between water molecules
Click on the pictures above to see how water,a polar molecule, dissolves an ionic compounddue to it polar nature.
Hydrogen bonds: a type of intermolecular bonding
ammonia in water
Click on the picture above to see an animation of ammonia and water interacting together.
A hyperlink to an advanced page showing a couple of animations including how di-pole attractions occur and london forces.
Another hyperlink to tutorials and animations
Van der Waals Forces1. dipole interactions
These subtle forces give enough attraction between some molecules that theycan form liquids and solids at low temperatures.
2. Dispersion Forces: tiny momentary dipoles in molecules due to electrondisturbances caused by the atoms around them.
Link to see a picture of a diamond. An example of network solidcovalent bonding.
One final type of covalent bonding: Network solid (covalent bonding in 3D)
http://www.ill.fr/dif/3D-crystals/salt.html
diamondgraphitebuckyball
silica SiO2
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