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Questions and Answers
What is the freezing point defined as?
What is the freezing point defined as?
- The temperature at which a liquid turns into a gas
- The temperature below which a liquid turns into a solid (correct)
- The temperature at which a gas condenses into a liquid
- The temperature at which a solid begins to melt
Which statement about the freezing point is correct?
Which statement about the freezing point is correct?
- It is always the same as the melting point of a substance
- It is independent of the substance's chemical properties
- It varies depending on the pressure exerted on the substance (correct)
- It is always higher than the boiling point of a substance
What happens when a liquid reaches its freezing point?
What happens when a liquid reaches its freezing point?
- It transforms into a gas
- It begins to evaporate
- It remains in a liquid state indefinitely
- It turns into a solid (correct)
Which of the following is an example of a freezing point?
Which of the following is an example of a freezing point?
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Which factor does not affect the freezing point of a liquid?
Which factor does not affect the freezing point of a liquid?
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Study Notes
Freezing Point Definition
- The freezing point is the temperature at which a liquid transforms into a solid.
- For pure substances, the freezing point is equal to the melting point.
Correct Statements about the Freezing Point
- The freezing point can vary based on pressure and the presence of impurities.
- The freezing point is a characteristic property of substances, allowing for identification.
Behavior at Freezing Point
- When a liquid reaches its freezing point, molecular motion slows down significantly.
- Energy in the form of heat is released during the freezing process, causing particles to bond and form a solid.
Examples of Freezing Points
- Water has a freezing point of 0°C (32°F) under standard atmospheric pressure.
- Different substances have distinct freezing points, such as ethanol at -114.1°C (-173.4°F).
Factors Affecting Freezing Point
- Factors that affect the freezing point include pressure, molecular structure, and the presence of solutes.
- The freezing point of a liquid is not influenced by the quantity of the liquid present.
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