The discussion centers on the anomalous behavior of water near its freezing point, specifically the contraction of water as it warms from 0°C to 4°C and the expansion as it cools from 4°C to 0°C. Participants explore the underlying molecular structure and hydrogen bonding patterns that contribute to these phenomena.
Participants generally agree on the existence of anomalous behavior in water and the role of hydrogen bonding, but the discussion includes varying interpretations of the mechanisms involved, particularly regarding the density changes and structural transitions.
Some assumptions about the molecular behavior of water and the definitions of density and structure are not fully explored, leaving room for further clarification and discussion.
So you're saying that when its temperature increases from zero degrees to 4 degrees, the irregularities in its hydrogen bonding increases, therefore it becomes denser?jajabinker said:When water is ice (0°C) it has a structure that has a lot of empty space in between, due to the low temperature and symmetrical hydrogen bonding.
http://www.uic.edu/classes/bios/bios100/lectures/02_15_hydrogen_bonding-L.jpg
In the liquid state there is a more irregular pattern for hydrogen bonding, but far from random.
As you decrease the temperature of a liquid,the density increases, for most materials. But as water goes below 4 degrees, there is a phase transition where these hollow structures form(like Ice 1h), which now reduce the average density of water.