Question

When the volume of a substance increases on heating, it is known as _________ expansion.

Answer 1

1. Gases take the shape of the container in which they are filled.
2. So, when they are heated, they gain energy to move freely and expand.
3. The volume will increase leading to volume thermal expansion.
4. Therefore, the process of the increase in size or volume of a substance on heating is known as volume expansion.