Ice Bomb
The ice bomb illustrates the fact that the volume of ice is greater than the volume of an equal mass of liquid water.
Some cold water is poured into a cast iron bomb, and a threaded plug is screwed into the bomb so that the bomb is tightly sealed. The bomb is then placed into a dry ice acetone slush, which is at negative 77 degrees Celsius and will cause the water inside the bomb to freeze. A wooden box is placed over the top of the bomb and slush bath.
It takes a short time for the water to freeze. When it does, the bomb explodes.
Some of the dry ice acetone slush is blown onto the explosion shield. Little bits of the cast iron bomb are left. When the water freezes, tremendous pressure is produced. The pressure is enough to cause this cast iron bomb with more than 1/8" thick sides to burst.
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