Does a gallon of water weigh more when it is frozen?

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asked May 20 in Mathematics by Makee (430 points)
Does a gallon of water weigh more when it is frozen?

1 Answer

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answered May 21 by Oliphant (2,940 points)
Quite the opposite.

When water is frozen it becomes dense and since the water is dense in a frozen state the water will actually weigh a bit less.

A gallon of water weighs in around 8.39 lbs while a gallon of frozen water weighs in around 7.99 lbs so although not much less the water still weighs less when frozen.

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