Question

Explain the thermal expansion of solids and liquids

Answer 1

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SOLIDS

Thermal expansion is the increase, or decrease, of the size (length, area, or volume) of a body due to a change in temperature. Thermal expansion is large for gases, and relatively small, but not negligible, for liquids and solids.

LIQUIDS

The liquid expands as it is heated. The heat from the hands increases the kinetic energy of the molecules in the liquid, so they move faster on average and tend to move further apart as the collide and bump around. This results in an expansion of the liquid.

Answer 2

Explanation:

When a substance is heated, the kinetic energy of its molecules increases and the molecules is start moving more vigorously as a result the distance between the molecules increases and the substance expands in solids the molecules are closely packed and are held together for me so solids expand on heating .

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