Question

write an experiment to prove that liquids expand on heating​

Answer 1

As water gets heated in flask, the level of water in the tube rises from A to B. This proves that liquids expand on heating. OR Experiment :Take a laboratory Celsius thermometer Suspend it with the help of a stand. Note the level of mercury thread in it.

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Answer 2

Liquids: Liquids expand when heated and they contract when cooled. Think about mercury in a thermometer! Ice however, expands when it freezes. As the water molecules lose heat, they vibrate less, and are able to form geometric patterns that take up more space.