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Why does a substance expand on heating? - Physics

Short Note

Why does a substance expand on heating?

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Solution

A substance is made up of molecules arranged in a lattice. On heating, the molecules vibrate faster in the lattice and bump into each other harder. So the distance between the molecules increases thus expanding lattice. Thus, the substances expand on heating.

Concept: Temperature
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APPEARS IN

Frank Class 9 Physics ICSE
Chapter 5 Heat
Exercise | Q 37 | Page 230
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