Question

for any substance why does the temperature remain constant during the change of state

Answer 1

The temperature of any substance remain constant during the change of statebecause the heat energy supplied is used up in changing the state of matter and also this heat is used for breaking of several bonds or attractive forces.This heat, which does not raise the temperature of the body, is called Laten heat.
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Answer 2

the temperature which they gain while heating is used for breaking the bonds between them hence their temperature remains constant during the change of state


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