Question

why does the temperature of a substance remain remain constant during the melting point and boiling point​

Answer 1

Latent heat is called evaporation heat or boiling heat. That is because when it reaches the boiling point or melting point , the substance starts changing into other state , for eg : water when reaches 100 C it starts melting ie changing it's state so the temperature at that moment remains constant .

Answer 2

bcz the heat energy is start in breaking the force of attraction between particles



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