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Questions and Answers
Which of the following best describes freezing?
Which of the following best describes freezing?
- The change of state from a liquid to a gas
- The change of state from a gas to a liquid
- The change of state from a liquid to a solid (correct)
- The change of state from a solid to a liquid
At what temperature does water freeze?
At what temperature does water freeze?
- 63 C
- 100 C
- The temperature varies depending on the amount of water
- 0 C (correct)
Which of the following substances does not have to be cold to the touch in order to freeze?
Which of the following substances does not have to be cold to the touch in order to freeze?
- Water
- Metal
- Wax (correct)
- Air
What happens to the thermal energy of a substance during freezing?
What happens to the thermal energy of a substance during freezing?
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What is a substance's freezing point?
What is a substance's freezing point?
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Study Notes
Freezing
- Freezing is the process of a substance changing from a liquid to a solid state.
- Water freezes at 0°C (32°F) at standard atmospheric pressure.
- Supercooled liquids, like supercooled water, can freeze without being cold to the touch.
- During freezing, the thermal energy of a substance decreases, and the molecules slow down, coming together to form a crystal lattice structure.
- A substance's freezing point is the temperature at which it changes state from a liquid to a solid, and it is a specific temperature that is unique to each substance.
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