1) During change of state, temperature does not rise or fall. What happens to the heat energy supplied or given out? Explain.
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As a result the temperature of the substance does not change. Eg: Ice remains at 0ºC for a while even if heat is being supplied to it, because this heat energy is used up in breaking the forces of cohesion (attraction) between the molecules.
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Answer: The heat energy given out or supplied is used up in overcoming the forces of attraction between the particles of matter. As a result the temperature of the substance does not change
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