18th November 2019


Why does water expand when it heats up?

This is the reason that ice floats in water rather than sinking. Marilyn responds: Water is an unusual liquid and has unique properties, but it doesn't behave the exact opposite of other liquids. Water does indeed expand when warms, and it contracts when it cools, but not at all temperatures.

Regarding this, how much does water expand when heated up?

The density of liquid water is approximately 0.96 grams per cubic centimeter at 100 C at atmospheric pressure. The density of water vapor at 100 C at atmospheric pressure is about a factor of 1600 less, and so water expands by a factor of 1600 when it turns into steam at atmospheric pressure.

What expands when heated?

Solids, liquids and gases all expand when heat is added. When heat leaves all substances, the molecules vibrate slower. The atoms can get closer which results in the matter contracting. Liquids: Liquids expand when heated and they contract when cooled.

Do liquids expand?

Water is one of the few exceptions to this behavior. When liquid water is cooled, it contracts like one would expect until a temperature of approximately 4 degrees Celsius is reached. After that, it expands slightly until it reaches the freezing point, and then when it freezes it expands by approximately 9%.
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