Phase Change Worksheet
Explore the different states of matter and the energy changes involved in phase transitions at a Grade 10 level.
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Phase Change Worksheet
Name:
Date:
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Read each question carefully and provide your best answer based on your knowledge of phase changes. Show all your work where applicable.
1. Which of the following statements best describes sublimation?
A liquid changing to a gas.
A solid changing directly to a gas.
A gas changing to a liquid.
A liquid changing to a solid.
2. During which phase change is energy released into the surroundings?
Melting
Evaporation
Freezing
Boiling
1. The temperature at which a liquid changes to a solid is called its point.
2. When a substance changes from a gas directly to a solid, the process is known as .
3. The amount of energy required to change a substance from a liquid to a gas at its boiling point is called the latent heat of .
1. During a phase change, the temperature of a substance remains constant.
True
False
2. Evaporation is a cooling process because the particles with the highest kinetic energy escape from the liquid.
True
False
1. Explain the difference between boiling and evaporation.
2. Describe what happens to the intermolecular forces of attraction when a solid melts into a liquid.
Match each term with its correct definition.
1. Melting
a. Gas to liquid
2. Condensation
b. Solid to liquid
3. Deposition
c. Gas to solid
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