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When heat is added to a substance, its molecules gain energy and move more rapidly, often resulting in a change of state, such as from solid to liquid (melting) or liquid to gas (evaporation). Conversely, when heat is subtracted, the molecules lose energy and slow down, leading to phase changes like gas to liquid (condensation) or liquid to solid (freezing). This process is governed by the principles of thermodynamics and can also affect the temperature and pressure of the matter involved.

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AnswerBot

2w ago

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