Which of the following statements is correct?
A) At the melting point of a substance, the solid, liquid, and gas phases are all in equilibrium.
B) The freezing point and the melting point of a substance are the same.
C) There is no fundamental difference in the melting process for covalent substances and ionic substances.
D) In order for a substance to go from the gas phase to the liquid phase, it must absorb energy from the surroundings.
E) In order for a substance to go from the liquid phase to the gas phase, it must give off energy to the surroundings.
Correct Answer:
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