While ice at 0 degrees Celsius is melting, the heat supplied
Correct answer: B. breaks the bonds of the solid structure without changing the temperature
- A. raises its temperature steadily
- B. breaks the bonds of the solid structure without changing the temperature
- C. is lost to the surroundings entirely
- D. lowers the internal energy
Explanation
The latent heat of fusion goes entirely into overcoming the forces holding the lattice, so the temperature stays at the melting point until all the ice has gone. This is why a mixture of ice and water is a reliable fixed point for calibrating a thermometer. The internal energy rises even though the temperature does not.
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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