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Derive the relation of coefficient of volume or cubical expansion. What is its unit ?

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Volume or cubical expansion -- " When a solid is heated and its volume increases, than expansion is called volume expansion or cubical expansion."

Let us consider a solid or liquid whose original is V0. When it is heated to a new volume, then the change in volume (ΔV) is directly proportional to (i) its original volume, v0 and (ii) increase in temperature ΔT.

where γ is called the coefficient of volume or cubical expansion.

Definition of γ : " It is defined as the increase in volume per unit volume per degree increase in temperature."

Unit of γ is °C-1 or K-1.

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