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