Question

what is the thermal expansion.​

Answer 1

Thermal expansion is defined as the tendency of a matter to change its shape, volume and area with respect to change in temperature.......

Answer 2

Thermal expansion

➡️Thermal expansion means expansion on being heated.

The thermal expansion of a solid is very small, that of a liquid is larger and that of a gas is the largest. On being heated, the molecules absorb energy and move farther apart. The smaller the intermolecular force, the farther the molecules move and the larger is the expansion