Questions and Answers
Which change of state is shown in the model?
Which change of state is shown in the model?
What happens during evaporation?
A liquid changes to a gas.
During which changes of state does the motion of the atoms decrease?
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During which changes of state do atoms overcome the attractive forces between them?
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Which changes of state are most responsible for Uyen seeing her breath in this way?
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Which change of state does the motion of the oranges most closely model?
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During which change of state would the volume of a substance increase the most?
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Which is the process by which a solid changes to a liquid?
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Which change of state is taking place when atoms gain energy and move faster?
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Which arrow represents the change of state when atoms lose energy?
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Which change of state has the wrong energy change listed?
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Which statement best describes the energy changes associated with evaporation and boiling?
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How is energy related to the change of state represented by the model when gas changes to solid?
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How is energy related to the change of state represented by the model when a solid changes to a liquid?
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What happens if atoms lose energy during a change of state?
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Study Notes
Changes of State Overview
- Sublimation occurs when a solid directly transitions to a gas without becoming liquid.
- Deposition is the reverse process of sublimation, where a gas changes directly to a solid.
Evaporation and Related Processes
- Evaporation is the process where a liquid transforms into a gas.
- Freezing and condensation are characterized by a decrease in atom motion; atoms lose energy and become more organized.
- Vaporization and sublimation involve atoms overcoming their attractive forces, leading to increased motion and energy.
Atmospheric Effects
- Condensation causes visible breath on cool mornings as water vapor from breath turns into tiny droplets, forming a cloud.
Physical Changes and Models
- Melting is the change of state from solid to liquid, modeled by the motion of spilled oranges.
- Sublimation results in a significant increase in the volume of a substance, indicating a drastic change in state.
Energy Changes in States
- The process of melting signifies a change from solid to liquid, where atoms gain energy and move more freely.
- During the phase transition from liquid to gas, atoms gain energy, allowing them to slide past one another and break free from the liquid surface.
- In scenarios where gases transition to solids, atoms lose energy, becoming more organized and drawn closer together.
Misconceptions and Clarifications
- The energy change during deposition is often misrepresented; this transition should be carefully studied.
- Both evaporation and boiling involve atoms gaining energy, though they occur under different conditions.
General Principles of Changes of State
- Atoms gain energy when transitioning from solid to liquid and gas, while they lose energy when moving from gas to liquid and solid.
- Visual representations, such as diagrams depicting the states and their transitions, are essential for understanding these concepts.
Studying That Suits You
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Description
Test your knowledge on the various changes of state with these informative flashcards. Each card presents a question related to processes such as sublimation, deposition, evaporation, and more. Ideal for students looking to reinforce their understanding of state changes in matter.