Question

define thermal expansion and its types
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Answer 1

Complete answer:

Let us first understand what thermal expansion is. When solids, liquids and gases are subjected to change in temperature, there is some change in their dimensions. Thermal expansion refers to the expansion or contraction of the dimensions of the solid, liquid or gas when their temperature is changed. There are three types of thermal expansion depending on the dimension that undergo change and that are linear expansion, areal expansion and volumetric volume.

(i) Linear expansion: Linear expansion is the expansion in the length of the substance which is subjected to increasing temperature. Linear expansion mostly takes place in solids.

(ii) Areal expansion: Areal expansion is the expansion of the surface area of the substance which is subjected to increasing temperature. Areal expansion is also called superficial expansion.

Answer 2

• Thermal enlargement refers to the enlargement or contraction of the scale of the solid, liquid, or gas once their temperature is modified.
• There square measure 3 styles of thermal enlargement counting on the dimension that endure amendment which square measure linear enlargement, region enlargement, and meter volume.

• Types of Thermal Expansion:

Following are three types of thermal expansion depending on the dimension that undergo change and that are

1. Linear expansion
2. Areal expansion
3. Volumetric volume