what is the physical state of water at 100 celsius

At 100°C, water can exist in both liquid and gaseous states at normal atmospheric pressure.

This temperature is called the boiling point of water.

Explanation

• At 100°C, liquid water starts changing into steam (water vapour).

• During boiling, both:

  • Liquid water

  • Steam (gas)
    are present together.

Important point

The temperature remains constant at 100°C during the change of state until all the water converts into steam. The heat supplied at this stage is used as latent heat of vaporisation.

Final Answer

At 100°C, water exists in:

Liquid state + Gaseous state (steam) simultaneously under normal atmospheric pressure.