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Q.
The coefficient of volume expansion is
Thermal Properties of Matter
Solution:
The coefficient of superficial expansion is same as the coefficient of areal expansion.
$\alpha=$ coefficient of linear expansion.
$\beta=$ coefficient of areal expansion.
$\gamma=$ coefficient of volume expansion.
$
\begin{array}{l}
\gamma=3 \alpha \\
\beta=2 \alpha
\end{array}
$
$\therefore $ coefficient of volume expansion is sum of coefficient of linear and superficial expansions