What happens to the temperature of a substance during a phase change?

What happens to the temperature of a substance during a phase change?

  • A. It decreases as energy is added. B. It increases slowly as energy is added. C. It increases rapidly as energy is added. D. It stays the same as energy is added.

  • Answer:

    T) D. It stays the same as energy is added.

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If you look at a temperature phase diagram, you get something like this below: ..................................phase change / ................................ ____________________/ .............................../ ............................ / .....phase change / .... ___________/ .../ ../ ./ / So, the answer is d. The extra energy is used up or given off in the phase change (depending on direction)

James

D. It is called latent heat. The energy goes into the phase change.

R MOORE

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