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Water has three states

Solid (ice)

liquid (water)

gas (steam)

When water is heated it expands and when it is cooled it contracts until about 4 degrees Celsius when it begins to expand again.

So the answer to your question is it depends on what temperature the water is. If it is a liquid and over 4 degrees then it will expand. If it is not frozen but somewhere between 0 and 4 degrees it will contract until about 4 degrees and then expand. Under 0 degrees it is ice not water, over 100 degrees it is steam not water.

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12y ago
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AnswerBot

5mo ago

Water expands when heated because the molecules move more rapidly, causing them to spread out. Eventually, the water will boil and turn into steam when it reaches its boiling point.

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Q: What is waters reaction to heat?
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What is the difference between heat of reaction and molar heat of reaction?

The heat of reaction is the total amount of heat released or absorbed during a chemical reaction, while the molar heat of reaction is the heat of reaction per mole of a substance involved in the reaction. The molar heat of reaction allows for comparison of the energy changes between different reactions on a per mole basis.


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