12 Questions
What is the phase transition in which a gas transforms into a solid without passing through the liquid phase?
Deposition
In which phase transition does a solid turn into a liquid?
Melting
What occurs when water vapor changes directly to ice without first becoming a liquid?
Deposition
Which process results in the phase transition of a substance from a liquid to a solid?
Freezing
What is the term used for the reverse of deposition?
Sublimation
In which phase transition does a gas transform directly into a solid?
Deposition
What is the term for the transition of a substance directly from the solid to the gas phase without passing through the liquid phase?
Sublimation
Which process results in the change of physical state from gas phase to liquid phase?
Condensation
What is the phase transition in which a liquid turns into a solid when its temperature is lowered below its freezing point called?
Melting
Which phase transition involves the direct transition of gas to solid without passing through the liquid phase?
Deposition
What term describes the equilibrium pressure of a vapor above its liquid or solid at a given temperature?
Vaporization
In what process does a substance transform directly from solid to gas without passing through the liquid phase?
Sublimation
Study Notes
Changes of State
- Matter can change from one state to another when thermal energy is released or absorbed.
- Changes of state involve the absorption or release of thermal energy.
Melting and Freezing
- Freezing: a phase transition in which a liquid turns into a solid when its temperature is lowered below its freezing point.
- Melting: a physical process that results in the phase transition of a substance from a solid to a liquid, occurring when the internal energy of the solid increases.
Deposition and Sublimation
- Deposition: a thermodynamic process in which gas transforms into solid without passing through the liquid phase.
- Sublimation: the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.
- Deposition is the reverse of sublimation, and sometimes deposition is called desublimation.
Examples of Deposition
- Water vapor changing directly to ice without first becoming a liquid, resulting in snow formation in clouds, frost, and hoar frost on surfaces.
Vaporization and Condensation
- Vaporization: a phase transition from the liquid phase to vapor.
- Condensation: the change of the physical state of matter from gas phase into liquid phase, and is the reverse of vaporization.
Vapor Pressure
- Liquids continuously vaporize, building up a partial pressure of the vapor state in a closed vessel.
- Vapor pressure of a liquid is the partial pressure of the vapor over the liquid, measured at equilibrium at a given temperature.
Test your knowledge on the different states of matter and phase transitions including melting, freezing, vaporization, condensation, and sublimation. Learn about how matter changes from solid to liquid to gas.
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