Why does a volume of boiled water increases?

When water is boiled, it undergoes a phase change from a liquid to a gas. This process is called vaporization. As the water molecules gain enough energy to overcome the intermolecular forces holding them together in the liquid state, they escape into the air as water vapor. This increase in volume is due to the expansion of the water molecules as they transition from a liquid to a gas. Additionally, the water vapor is less dense than liquid water, further contributing to the increase in volume.

When water is boiled, its temperature rises to 100 degrees Celsius (212 degrees Fahrenheit) at sea level. At this temperature, the water molecules gain enough energy to overcome the cohesive forces that hold them together, causing them to evaporate and turn into water vapor.

The water vapor is less dense than the liquid water, so it rises and expands, increasing the volume of the water. This is why a volume of boiled water increases.

The increase in volume is also due to the fact that the boiling process causes the water molecules to move more rapidly and randomly, creating more space between them.