It takes energy to go from a solid to a liquid or a liquid to a gas. Conversely, energy is released when a material goes from a gas to a liquid or from a liquid to a solid. Duration: 4:59.
VIDEO CHECK QUESTIONS
8.18a What does the heat of melting describe?
8.18b What does the + or – sign in front of the heat of melting and heat of freezing indicate?
8.18c. Why is the heat of melting referred to as a rate?
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