How does the volume of water change when it freezes?

Answer 1

The volume of water changes when the water changes state from a liquid to a solid because of the formation of hydrogen bonds within it. The bonds, which are weak, are always present to some degree in the liquid, but as water goes solid, the formation of hydrogen bonds sets up a "molecular arrangement" in the water. The bonds force the water molecules into a solid structure and they push the molecules apart to do that. The extra space the water molecules then take up makes the ice less dense than the water from which it formed. That is why ice is less dense than water, and why it floats on water as we see it does.

Answer 2

Water undergoes a phase transition into a crystalline solid phase called ice. Ice has a lower density than water, thus water's volume tends to increase as it freezes.

This is a very unique property of water; most materials contract instead when cooled.

The volume increase due to water changing into ice during periods of frost is sometimes responsible for water pipes bursting and causes leakages.

Answer 3

It increases because water expands when frozen, this occurs becasue of hydrogen bonding.

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Answer 4

That is because the gas particle's are traped in the ice