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Author Question: Which of the following statements are true concerning the latent heat of fusion? 1. It is also ... (Read 53 times)

maegan_martin

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on: Jul 16, 2018
Which of the following statements are true concerning the latent heat of fusion?
 
  1. It is also called evaporation.
  2. It is expressed in calories per gram.
  3. It will cause a complete change of state.
  4. It is expressed in grams per degree Celsius.
  a. 1 and 2 c. 2 and 3
  b. 1 and 3 d. 2, 3, and 4

Question 2

The temperature at which a solid converts to a liquid is the _____ point.
 
  a. freezing c. boiling
  b. melting d. critical


meltdown117

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: C
Latent heat of fusion is the amount of heat, in calories, that must be added to cause a complete change of state. Evaporation is change from liquid to gas. Latent heat is expressed as calories per gram. Evaporation is the passive change of state over time, with no addition of heat.

Answer to Question 2

ANS: B
This is the definition of melting point. Freezing is the change of a substance from a liquid to a solid. Melting is the change from a solid to a liquid. The temperature at which a liquid converts to a gaseous state is the boiling point. The critical point is used to describe the critical temperature and critical pressure of a substance.


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