Q1: for any substance, why does the temperature remain constant during the change of state?
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Because the heat which is provided is being used to overcome the forces of attraction between the molecules of that state . So , although we provide heat but since it is used to overcome attraction between molecules hence the temperature doesn't rise
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Explanation:
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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