Question

When water boils the temperature remains constant. Give reasons.

Answer 1

• Water starts boiling at ${100}^{o}C$ temperature. After this temperature., the temperature of water becomes constant for some time even after the constant supply of heat.
• Here the heat supplied is used to overcome the intermolecular force of attraction present in a water molecule to convert it into vapour.
• This heat is known as latent heat of vaporization.
• The change in temperature only takes place after conversion of water into vapour.