Question

Which metal has the highest thermal expansion?

Answer 1

1. Thermal expansion is defined as the tendency of a matter with an increase in temperature to change its shape, size and volume.
2. When we increase the temperature of Aluminium $\left(\mathrm{Al}\right)$it expands.
3. Aluminium has the highest thermal expansion coefficient about $22\times {10}^{-6}{K}^{-1}$.
4. Aluminium is used in the transportation of trucks, railways and automobiles as casting.
5. it is also used in packaging.
6. It is also used in qualitative analysis.
7. Therefore, Aluminium has the highest thermal expansion.