Question

DEFINE THERMAL EXPANSION.​

Answer 1

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Thermal expansion is the tendency of matter to change in shape, volume, and area in response to a change in temperature. Temperature is a monotonic function of the average molecular kinetic energy of a substance.

Answer 2

Thermal Expansion :-

→ Thermal expansion is the tendency of matter to change in shape, area, and volume in response to a change in temperature.

→ All three states of matter (solid, liquid and gas) expand when heated.

→ When a solid is heated, its atoms vibrate faster about their fixed points.