Question

why does the temperature remain constant during its melting point or boiling point explain​

Answer 1

##Here is the answer.
*It is because substance makes use of latentheat of fusion to overcome force of attraction between particles of solid to change into liquid during melting and latent heat of vaporization to overcome force of attraction between particles of liquid to change into vapours during boiling.*
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Answer 2

It is because substance makes use of latent heat of fusion to overcome force of attraction between particles of solid to change into liquid during melting and latent heat of vaporization to overcome force of attraction between particles of liquid to change into vapours during boiling