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Questions and Answers
What occurs when a substance undergoes a phase change from solid to liquid?
What occurs when a substance undergoes a phase change from solid to liquid?
- Molecules release heat energy
- Molecules stop moving altogether
- Molecules speed up and move farther apart (correct)
- Molecules slow down and move closer together
What is the temperature at which water boils?
What is the temperature at which water boils?
- 100°C, 212°F, or 373 K (correct)
- 50°C, 122°F, or 323 K
- -273.15°C, -459.67°F, or 0 K
- 0°C, 32°F, or 273 K
What is the process called when a substance changes from a gas to a liquid?
What is the process called when a substance changes from a gas to a liquid?
- Condensation (correct)
- Vaporization
- Evaporation
- Melting
What happens to the molecules during the process of vaporization?
What happens to the molecules during the process of vaporization?
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What is the term for the lowest possible temperature, at which all matter stops moving?
What is the term for the lowest possible temperature, at which all matter stops moving?
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What is the process called when a substance changes from a solid to a gas, without going through the liquid phase?
What is the process called when a substance changes from a solid to a gas, without going through the liquid phase?
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