Multiple choice

Why does the temperature remain constant during the melting of ice, although heat is continuously supplied?

  1. Because heat is used up in breaking the bonds between the particles

  2. Because heat is lost in the atmosphere

  3. Because heat is used up in maintaining equilibrium in the system and surroundings

  4. Because heat is absorbed by the container
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A Correct answer
Explanation

During the melting of ice, the temperature of the system remains constant at 0o C,till all the ice melts, eventhough heat is continuously supplied. This is because the heat supplied is used up in changing the state by overcoming the forces of attraction between the particles. As this heat energy is absorbed by the ice without showing any rise in temperature, it is called latent heat of fusion. 

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