Question

​What is coefficient of volume expansion? What is its formula?

Answer 1

Dear Student,

Coefficient of volumetric expansion ($\gamma$ ) is defined as: increase in volume per unit original volume per Kelvin rise in temperature is called coefficient of volumetric expansion.

$$\begin{gathered} ∆V=\gamma V∆T \\ or\gamma =\frac{∆V}{V∆T} \\ \gamma =\frac{ChangeinVolume}{OriginalVolume\times Changeintemerature(inK)} \end{gathered}$$

$$\begin{gathered} Relationbetweenco-efficientofexpansion \\ \alpha =\frac{\beta }{2}=\frac{\gamma }{3} \\ or\gamma =2\alpha and\gamma =\frac{3\beta }{2} \\ where \\ \alpha =co-efficientoflinearexpansion \\ \beta =co-efficientofsurfaceareaexpansion \end{gathered}$$

Regards.