Phase Changes and Heating Curves
How is freezing similar to deposition? Both result in a phase change to liquid. Both result in a phase change to plasma. Both result in a phase change to gas. Both result in a phase change to solid.
Both result in a phase change to solid.
What is the process of condesation? Example:
Gas to liquid Example: Water vapor to water
What is the process of deposition? Example:
Gas to solid; skips the liquid phase Example: Water vapor to ice (frost on a widow)
Why does room temperature water disappear over time? It sublimates. It condenses. It boils off. It evaporates.
It evaporates.
How does adding energy to a solid change the substance? It turns it into ice. It condenses the substance. It results in deposition. It turns it into a liquid.
It turns it into a liquid.
What is the process of vaporization? Example:
Liquid to gas; boiling does this or evaporation Example: Water to water vapor
What is the process of freezing? Examples:
Liquid to solid; It involves the loss of energy in the form of heat Example: Water to ice
What is the process of sublimating? Example:
Solid to gas; Skip the liquid phase Example: Dry ice to CO2 gas
What is the process of melting? Example:
Solid to liquid Example: Ice to water
What is sublimation and why does it occur? It is when a gas changes into a solid. It does this because some substances cannot exist as liquids at certain temperatures and pressures. It is when a liquid changes into a gas. It does this because molecules escape surface tension and enter a gas phase. Sublimation is when a solid changes into a gas. It does this because some substances cannot exist as liquids at certain temperatures and pressures. It is when a solid turns to a liquid. It does this because of added energy.
Sublimation is when a solid changes into a gas. It does this because some substances cannot exist as liquids at certain temperatures and pressures.
Why are there plateaus on a heating curve? The plateau represents the change of a substance from one phase to another where temperature does not increase. The plateau represents when a substance changes directly from a solid to a gas. The plateau represents when a substance changes from liquid to gas. The plateau represents when there is a temperature increase in a substance.
The plateau represents the change of a substance from one phase to another where temperature does not increase. Explanation Plateaus are called phase transitions. It is when a substance changes between phases, but the temperature of the substance doesn't change.
What is melting?
When a solid changes phase and becomes a liquid Solid + energy goes to liquid
What is a phase change?
when a substance changes from one phase to another