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Not necessarily. You have to have a space of air in the bottle. The expansion/contraction happens because the water is heating/cooling the air. Liquids are usually considered incompressible and hence will not change their volume when heated or cooled (unless it evaporates or melts!).

Assuming that you have an air space:

If you have cold water in a sealed bottle that you heat up, it will expand.

If you put hot water in a bottle and seal it, it will contract as it cools.

If the bottle is not sealed, there will be no volume change.

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14y ago

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