Question

Define thermal expansion of liquids.

Answer 1

1. When liquid is heated, both liquid and container undergo a change in their volume.
2. The intermolecular force of attraction in liquids is weaker as compared to solids.
3. If the liquid is heated, molecules will start to vibrate faster because of their weak intermolecular force between each other.
4. When molecules are vibrating faster, they need more space to occupy, which leads to the expansion of liquids.