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What is the process of changing a substance from a solid to a liquid state?
What is the process of changing a substance from a solid to a liquid state?
The freezing point of a substance is always higher than its melting point.
The freezing point of a substance is always higher than its melting point.
False
What is the term for the energy required to change the state of a substance without changing its temperature?
What is the term for the energy required to change the state of a substance without changing its temperature?
Latent heat
The process of changing a substance from a liquid to a gas state is called ______________.
The process of changing a substance from a liquid to a gas state is called ______________.
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What is the term for the graph that shows the relationship between the temperature and pressure of a substance and its physical state?
What is the term for the graph that shows the relationship between the temperature and pressure of a substance and its physical state?
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Sublimation is the process of changing a substance from a solid to a gas state without going through the liquid phase.
Sublimation is the process of changing a substance from a solid to a gas state without going through the liquid phase.
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What is the term for the temperature at which a substance changes from a solid to a liquid?
What is the term for the temperature at which a substance changes from a solid to a liquid?
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The process of changing a substance from a gas to a solid state without going through the liquid phase is called ______________.
The process of changing a substance from a gas to a solid state without going through the liquid phase is called ______________.
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Match the following terms with their definitions:
Match the following terms with their definitions:
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The triple point is the point on a phase diagram where all three phases (solid, liquid, and gas) coexist.
The triple point is the point on a phase diagram where all three phases (solid, liquid, and gas) coexist.
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Study Notes
Interconversion of States of Matter
Melting and Freezing
- Melting: The process of changing a substance from a solid to a liquid state.
- Freezing: The process of changing a substance from a liquid to a solid state.
- Melting point: The temperature at which a substance changes from a solid to a liquid.
- Freezing point: The temperature at which a substance changes from a liquid to a solid.
Sublimation and Deposition
- Sublimation: The process of changing a substance from a solid to a gas state without going through the liquid phase.
- Deposition: The process of changing a substance from a gas to a solid state without going through the liquid phase.
- Examples: Dry ice (solid CO2) sublimes to carbon dioxide gas, and water vapor in the air deposits as frost or ice.
Evaporation and Condensation
- Evaporation: The process of changing a substance from a liquid to a gas state.
- Condensation: The process of changing a substance from a gas to a liquid state.
- Examples: Water evaporates from the ocean and condenses into clouds, and water vapor in the air condenses into droplets on a cold surface.
Phase Diagrams
- Phase diagram: A graph that shows the relationship between the temperature and pressure of a substance and its physical state.
- The diagram typically includes three curves: solid-liquid, liquid-gas, and solid-gas.
- The curves intersect at the triple point, where all three phases coexist.
Latent Heat
- Latent heat: The energy required to change the state of a substance without changing its temperature.
- Latent heat of fusion (LHF): The energy required to change a substance from a solid to a liquid.
- Latent heat of vaporization (LHV): The energy required to change a substance from a liquid to a gas.
- Units: J/g or kcal/g
Interconversion of States of Matter
Melting and Freezing
- Melting is the process of changing a substance from a solid to a liquid state.
- Freezing is the process of changing a substance from a liquid to a solid state.
- Melting point is the temperature at which a substance changes from a solid to a liquid.
- Freezing point is the temperature at which a substance changes from a liquid to a solid.
Sublimation and Deposition
- Sublimation is the process of changing a substance from a solid to a gas state without going through the liquid phase.
- Deposition is the process of changing a substance from a gas to a solid state without going through the liquid phase.
- Examples of sublimation and deposition include dry ice (solid CO2) subliming to carbon dioxide gas, and water vapor in the air depositing as frost or ice.
Evaporation and Condensation
- Evaporation is the process of changing a substance from a liquid to a gas state.
- Condensation is the process of changing a substance from a gas to a liquid state.
- Examples of evaporation and condensation include water evaporating from the ocean and condensing into clouds, and water vapor in the air condensing into droplets on a cold surface.
Phase Diagrams
- A phase diagram is a graph that shows the relationship between the temperature and pressure of a substance and its physical state.
- The diagram typically includes three curves: solid-liquid, liquid-gas, and solid-gas.
- The curves intersect at the triple point, where all three phases coexist.
Latent Heat
- Latent heat is the energy required to change the state of a substance without changing its temperature.
- Latent heat of fusion (LHF) is the energy required to change a substance from a solid to a liquid.
- Latent heat of vaporization (LHV) is the energy required to change a substance from a liquid to a gas.
- Units of latent heat are J/g or kcal/g.
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Description
This quiz covers the concepts of melting, freezing, sublimation and deposition, including the points at which they occur.
