Question

9• Why does the temperature of a substance remains constant during melting and boiling even when heat is being supplied to it continuously?

Answer 1

because during melting and boiling the hidden heat is used which is known as latent heat of energy. therefore temperature of a substance remains same.

Answer 2

the temperature of a substances remains constant during melting and boiling even when heat is being supplied to it continuously because the heat that is supplied is being used up in changing a state of matter by overcoming intermolecular force of attraction.This heat is known as latent heat of fusion for melting and latent heat of vaporisation for boiling.therefore the temperature remains same.