Expansion of Matter

Matter expands on heating, i.e., solids, liquids and gases expand on heating. Let us consider expansion of solids:

Three types of expansions are considered in case of solids. This classification is done according to the shape of the solids.

Sub Topics

Linear Expansion
Superficial expansion
Cubical Expansion

Linear Expansion

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When length of a solid (rod) is much greater than its breadth and thickness, linear expansion or expansion in length is considered.

Length of a rod

Length of a rod increases on heating

Superficial expansion

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When a solid is in the form of a Lamina, its length and breadth increase on heating. Hence, its area also increases. This is known as superficial expansion.

Area of Laminar body increases on heating

Cubical Expansion

Let us now consider the three types of expansion in detail.