Question

The temperature does not rise during the melting and boiling through the heat energy is constantly supplied

Answer 1

Answer:

The temperature doesn't rise during the melting and boiling, though heat is produced because the extra amount of heat is used up to break up the molecular bonding during the process of Boiling and evaporation.

In simple, this is known as the latent heat of Vaporisation.

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Answer 2

as the total heat is absorbs