Define latent heat of vaporisation. Why does temperature remains constant during boiling of liquid?

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Solution

Latent heat of vaporisation- It can be defined as the amount of heat needed for the conversion of 1 kg of liquid at its boiling point to gas at the same temperature.
The temperature remains constant during the boiling of liquid because all the heat energy which is applied is used up in changing the state of water from liquid to gaseous state i.e. Vapour.

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Similar questions

Q. Why does the temperature remain constant during the boiling of water even though heat is supplied continuously ?

Q. (a) Define the term 'latent heat of vaporisation' of a liquid. What is the value of the latent heat of vaporisation of water ?
(b) Draw a labelled diagram of the experimental set-up to study the latent heat of vaporisation of water.

Q. When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporisation :
(a) rises very slowly
(b) rises rapidly until steam is produced
(c) first rises and then becomes constant
(d) does not rise at all

Why does the temperature remain constant during boiling?

The process due to which a liquid changes into a gaseous state at a constant temperature by releasing heat energy is known as boiling or vaporisation.

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