Phase changes

Boiling

A phase transition from liquid state to the gas state, usually occurring when a liquid is heated to its boiling point.

Endothermic change

A process or chemical reaction defined by the absorption of heat.

Exothermic change

A process or chemical reaction that is defined by the release of heat.

Vaporization

A transition phase of an element or compound from liquid state to a vapor state.

Freezing

A transition phase that turns liquid into a solid when the overall temperature is lowered to its freezing point.

Heat of Vaporization

Heat absorbed when a liquid vaporizes, the quantity of heat required at a specific temperature.

Melting

Its a physical process that makes a solid substance melt into a liquid.This occurs when heat and pressure is applied to the solid.

Deposition

The direct change of a vapor to a solid by cooling the substance down, reverse of sublimation.

Pahse change

Phase Change: Evaporation, Condensation, Freezing, Melting, Sublimation & Deposition. Substances on Earth can exist in one of four phases, but mostly, they exist in one of three: solid, liquid or gas. Learn the six changes of phase: freezing, melting, condensation, vaporization, sublimation and deposition.

Sublimation

Sublimation is a type of phase just like melting, freezing,and evaporation. In sublimation a substance changes from solid to a gas without passing to a liquid phase.

Heat of Fusion

The change in enthalpy resulting in providing heat to change a substance from a solid to a liquid.

condensation

The process in which a substance in a gaseous state turns to a liquid state (kind of like rain and clouds). Its caused by the change in pressure and temperature.

Evaporation

The process of a substance in a liquid state changed to a gaseous state due to an increase of heat and temperature.