Question

Explain the variation of density in solids, liquids, and gases due to the change in temperature.

Answer 1

1. Temperature is the measure of the hotness or coldness of an object.
2. Density is the measure of how closely any given entity is packed.
3. Density is defined as the mass per unit volume.
4. The mathematical equation for density is
   $Density=\frac{Mass}{Volume}$.
5. When the substances are heated, some of the molecules begin to move faster and farther apart.
6. This results in an increase in the volume of the substance.
7. Increase in volume results in a decrease in density.
8. Thus, the density decreases on increasing the temperature.
9. Similarly, the density increases on decreasing the temperature.

Thus, the densities of solids, liquids, and gases are inversely proportional to the temperature.