By how much does the volume of water decrease when it freezes to ice?

Question

By how much does the volume of water decrease when it freezes to ice?

Answer 1

Temperature 20 C, density = 0.998207 g/cm^3

Temperature 4 C, density = 0.999975  <== most dense

Temperature 0 C, density = 0.9998425

Temperature -0.1 C, density = 0.9150  <== about 9% less dense

Answer 2

Water actually expands by about 10% when it freezes.  That's why freezing can cause damage to pipes.

Answer 3

Water expands when frozen. At what rate, I don't know. It's why, up north, we have two seasons. Winter and road construction.

Answer 4

Volume of water actually increases if frozen. Thats why ice floats on water. The rate is approximately 11/12, that is, 11 unit vol of water will generate apprx. 12 unit vol of ice.

Answer 5

It actually increases - by about 10 %.

Answer 6

It doesn't decrease. An ice cube has a greater volume than

the volume of water that made it. This makes the density

of ice less than that of water, which is why ice floats in water.

As far as how much, 10 percent of the ice is above the water

surface, so the volume of water increases by 10 percent.