Heating Curves (College)
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Heating Curves
Use the heating curve shown below to answer the questions that follow.

1.
Which of the following exists in the temperature range between -75ºC and 0ºC?
- Melting (phase change)
- Liquid
- Solid
- Gas
2.
Which of the following is represented in the temperature range between 0ºC and 100ºC?
- condensation
- plasma
- solid
- liquid
3.
Which of the following is represented by A?
- an endothermic process
- freezing
- condensation
- sublimation
4.
Which of the following is represented by D?
- A change in average kinetic energy
- An exothermic process
- An endothermic process
- A decrease in potential energy
5.
Which of the following is found at D?
- The freezing point
- The melting point
- The sublimation point
- The boiling point
6.
Which of the following is represented in the temperature range between 100ºC and 200ºC?
- liquid
- evaporation
- gas
- 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?
- It shows changes in heat added over time in going from a gas to a liquid to a solid
- It shows changes in heat added over time in going from a solid to a liquid to a gas
- It shows changes in heat added over time involved in phase changes
- It shows changes in heat added over time involved in phases
8.
Which of the following is represented by B?
- freezing
- melting
- condensation
- 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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