Phase Change Worksheet
Explore the principles of phase changes, including melting, freezing, boiling, condensation, sublimation, and deposition, with real-world examples and calculations.
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Standards
Phase Change Worksheet
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Date:
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Read each question carefully and provide your best answer. Show all your work for calculations.
1. Which of the following phase changes is an endothermic process?
Freezing
Condensation
Melting
Deposition
2. What happens to the temperature of a substance during a phase change?
It increases steadily
It decreases steadily
It remains constant
It fluctuates unpredictably
3. The process of a solid changing directly into a gas without passing through a liquid phase is called .
4. The amount of energy required to change a substance from a solid to a liquid at its melting point is known as the .
5. Evaporation is an exothermic process.
True
False
6. Describe the difference between boiling and evaporation.
7. Explain why a substance's temperature does not change during a phase change, even though heat is being added or removed.
8. Calculate the amount of heat (in Joules) required to melt 250 grams of ice at 0°C. The latent heat of fusion for water is 334 J/g.