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Water expands when it freezes because, due to the hydrogen bonding, it forms a tetrahedral lattice. Other things that expand when frozen include silicon, bismuth, antimony, gallium, and germanium
for more information:
http://en.wikipedia.org/wiki/Properties_of_water#Density_of_water_and_ice
Wiki User
∙ 14y ago
Wiki User
∙ 10y agoIn most cases as objects get colder they contract and have higher densities since the kinetic energy of the individual molecules decrease and thus the intermolecular forces become relatively stronger and thus pull the structure together. But there are few cases where decrease in temperature actually yields a decrease in density, the most familiar of which is water. As water starts to freeze, it forms a crystalline structure created by hydrogen bonding, which actually places more distance between the molecules and thus results in a lower density, which is why ice floats on water. Water is the only molecule that floats when it turns solid, so it is the only molecule that expands when it gets colder.
Wiki User
∙ 13y agoWater, mainly. There may be others, but I am not aware of any specific substance. Usually the volume of a substance will reduce if you freeze it.
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Does freezing an object cause an object to expand?
Water is one of the things that expands when it freezes, yes. But most other substances get somewhat smaller (contract) when they freeze.
What do substances do when heated because of the molecules?
they expand
Does aluminium swell?
No, although it does expand with heat as do most substances.
How do they prevent substances to solidify?
By maintaining the temperature over the freezing point.
What causes coke to expand when frozen?
It is the water in Coke that causes it to expand when frozen. Water, unlike most substances, expands as its temperature decreases, below a certain point. For an explanation, see = Why does water expand when it freezes? =
Does properly air-entrained cement paste shrink or expand upon freezing?
It will shrink!
Do Most liquids do not expand upon freezing?
No only water it's the odd one.
What does freezing and thawing of rocks do to them?
Freezing a rock would shrink it some (contract) while the thawing would expand it. This applies to most substances, water being the obvious exception.
Does freezing an object cause an object to expand?
Water is one of the things that expands when it freezes, yes. But most other substances get somewhat smaller (contract) when they freeze.
When do substances expand?
Yes.
Do substances expand on heating?
yes
Do substances expand when hot?
Yes.
When most substances are heated they....?
They expand
Do cooled substances expand?
Yes
What does liquids become when they freeze?
Liquids become solids upon freezing. Most solids contract when they freeze. The expansion of water when it becomes ice is an unusual property.
Could freezing point depression be used for substances that are not soluble in water?
Substances which are insoluble in a given solvent do not cause a freezing point depression in that solvent.
How does the volume of material chage as more heat energy is added to it?
Most substances expand as their temperature increases. One exception that I can think of is water, when it is near freezing. Water at 4°C will expand when cooled to 0°C, then as it freezes to ice it expands. This is why ice floats in water.
