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Heating Curves (College)

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Heating Curves

Use the heating curve shown below to answer the questions that follow.
Heating Curve
1. 
Which of the following exists in the temperature range between -75ºC and 0ºC?
  1. Melting (phase change)
  2. Liquid
  3. Solid
  4. Gas
2. 
Which of the following is represented in the temperature range between 0ºC and 100ºC?
  1. condensation
  2. plasma
  3. solid
  4. liquid
3. 
Which of the following is represented by A?
  1. an endothermic process
  2. freezing
  3. condensation
  4. sublimation
4. 
Which of the following is represented by D?
  1. A change in average kinetic energy
  2. An exothermic process
  3. An endothermic process
  4. A decrease in potential energy
5. 
Which of the following is found at D?
  1. The freezing point
  2. The melting point
  3. The sublimation point
  4. The boiling point
6. 
Which of the following is represented in the temperature range between 100ºC and 200ºC?
  1. liquid
  2. evaporation
  3. gas
  4. solid
7. 
Assuming that the y-axis represents temperature and that the x-axis represents heat added, which of the following correctly describes this heating curve?
  1. It shows changes in heat added over time in going from a gas to a liquid to a solid
  2. It shows changes in heat added over time in going from a solid to a liquid to a gas
  3. It shows changes in heat added over time involved in phase changes
  4. It shows changes in heat added over time involved in phases
8. 
Which of the following is represented by B?
  1. freezing
  2. melting
  3. condensation
  4. evaporation
9. 
Which of the following can be reasonably concluded about the heat required for evaporation, compared to that of melting, based on the graph shown in Question #1? Briefly explain your answer.










10. 
Briefly explain how potential energy and average kinetic energy change in the temperature range between -75ºC and 0ºC.



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