Question

$\huge\bold\red{Question:}$

Why does the temperature of a substance remain constant during its melting point or boiling point?

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Answer 1

Answer:

The extra heat supplied to the boiling water is used in the vaporization of a liquid, which is known as the latent heat of vaporization. That's why the temperature of a substance remains constant during its melting or boiling.

Explanation:

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Answer 2

Answer:

it is because of the latent heat present in that substance