Question

Why does demperature remain
Constant during melting & boiling
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Answer 1

Answer:

Explanation:

during melting, the heat being added to a substance goes into breaking apart the "molecules" or breaking down the crystal lattice, not into raising the temperature. During the phase change all the molecules continue to have the same kinetic energy, and therefore the temperature remains constant.

Answer 2

During melting and boiling of any substance temperature remains constant because when we heat the body, first of all, it changes the state of a body and after that temperature starts increasing.