Question

How does the density of a liquid change with the rise in its temperature ?

Answer 1

1. When heated, the energy is utilized to break the molecular force.
2. When the molecular force decreases, they become loosely packed.
3. When they are loosely packed, the number of molecules in a unit area decreases.
4. It means the density decreases.
5. As the liquids expand on heating, the density of the liquid decreases rapidly with the rise in temperature and vice versa.
6. When the density decreases the liquid rises up.

Hence, when the temperature increases, the liquid's density decreases.