why do substances expand on heating ?
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Explanation:
when substances expand or contract, their particles stay the same size.it is the space between the particles that changes: the particles in a solid vibrate when it is heated, and Take up more room. the particles in a solid Move around each other when it is heated and Take up more room.
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Answer:
Molecules within gases are further apart and weakly attracted to each other. Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.
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