Question

Explain why the temperature remains constant during boiling of a liquid.

Answer 1

Hint- In order to deal with this question first we will talk about the term boiling, then we will take an example of water and further we will find the reason for the given statement.

Complete step-by-step answer:
Boiling: Boiling is the sudden vaporization of a liquid that happens as a liquid is heated to its boiling level, the temperature at which the liquid's vapor pressure is equal to the ambient atmosphere's pressure on the liquid.
To comment about given statement we will take an example of water
During the boiling of water the temperature stays constant while heat is supplied continuously. It is because the heat provided by the water particles is consumed, and this heat increases their kinetic energy.
Therefore the bond between the water particles is diminished due to an increase in kinetic energy, and they travel more easily compared with vapor. Consequently, they are gas. Therefore, the temperature stays constant only though heat is continually supplied to the water.

Additional information-
A substance's melting point is the temperature at which it transitions from solid to liquid state. Strong and liquid form remains in equilibrium at the melting point. A substance's melting point depends on heat, and is typically defined at a normal pressure like 1 atmosphere or 100 kPa.

Note- A substance's boiling point is the temperature at which a liquid's vapor pressure is equal to the pressure inside the material, and the material transforms into a vapour. A liquid's boiling point varies according to the ambient pressure surrounding it. Boiling water is used as a way to make it potable by destroying currently present bacteria and viruses.