Question

3. For any substance, why does the temperature
remain Constant during the change of state?
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Answer 1

Explanation:

The temperature of any substance remain constant during the change of state because 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.

Answer 2

Answer:

Heat is required to change the phase as well as to increase the temperature. During phase transitions, the heat supplied (called the latent heat) is fully utilised to change the state by overcoming the force of attraction between the particles.  

So, the temperature remains constant during the change of state.

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