It's not exempt.

Because of the physics of the oxygen atom, the bonds to the hydrogen atoms are slightly assymetric; the consequence is strong van der Waal's forces between the molecules. The result of htis is that the intermolecular forces are stronger than they would be if the assymetry did not exist and thus it remains liquid until a higher temperature.

As far as expansion on freezing goes, it moves from an essentially amorphous structure to a 6-fold crystalline one in which the molecules are not as tightly packed. Again, entirely within the laws of physics.

But yes, it is amazing stuff. If it wasn't as it is, neither would we be!

--

Stephen



Edited 1 time(s). Last edit at 03/18/2005 04:38AM by sftonkin.