Question

When the water is heated from $0$ to $10$, its volume _____.

Answer 1

The water is heated from $0$ to $10$:

1. The volume of a substance is inversely proportional to its density, so the volume will decrease as the density increases.
2. Generally, increasing the temperature of a substance will cause an increment in volume due to the increase in the mean molecular distance.
3. Now when we heat water from $0^{\mathrm{o}}\mathrm{C}$ to $4^{\mathrm{o}}\mathrm{C}$, the volume decreases and density increases, as ice has the highest density at $4^{\mathrm{o}}\mathrm{C}$ (that is anomalous expansion of water).
4. After $4^{\mathrm{o}}\mathrm{C}$ the density of the water reduces due to the increase in the mean molecular distance and hence the volume of the water increases.