* Molecular Motion: As temperature increases, the molecules within a liquid gain kinetic energy and move faster. This increased movement causes the molecules to spread further apart.
* Volume Expansion: The increased spacing between molecules leads to an overall increase in the volume of the liquid.
* Density Calculation: Density is calculated by dividing mass by volume (Density = Mass/Volume). Since the mass remains relatively constant while the volume increases, the density decreases.
Exceptions:
There are a few exceptions to this general rule, such as water between 0°C and 4°C. In this temperature range, water actually becomes *denser* as it warms. This unique behavior is due to the hydrogen bonding structure of water molecules.
Let me know if you'd like to explore the density of water in more detail!
