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When you heat the base of a liquid, the particles heat up and rise, as they become less dense. When they reach the top of the container, they cool and sink, as they now become more dense again. When they get to the bottom, the whole process starts again.

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14y ago
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12y ago

The molecules separate due to the heat, until eventually the particles have separated so much that the state of matter changes. This means that the liquid has changed into a gas.

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13y ago

They vibrate faster and the chemical bonds begin to break.

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12y ago

the molecules evapourate

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Q: What happens to molecules of a liquid when heated?
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