faasireaktsiooni

Faasireaktsioon, also known as a phase transition, is a physical process in which a substance changes from one state of matter to another. The three primary states of matter are solid, liquid, and gas. Phase transitions occur due to changes in temperature, pressure, or both. The most common phase transitions are melting, freezing, vaporization, condensation, sublimation, and deposition.

Melting is the transition from a solid to a liquid state. This occurs when heat is applied to a solid, causing its particles to gain enough energy to overcome the forces holding them in place. Freezing is the reverse process, where a liquid turns into a solid as it loses heat.

Vaporization is the transition from a liquid to a gas. This can occur through boiling, where the liquid turns into vapor at a specific temperature, or evaporation, where the liquid turns into vapor at any temperature. Condensation is the reverse process, where a gas turns into a liquid.

Sublimation is the transition from a solid to a gas without passing through the liquid state. This occurs when a solid is heated above its triple point, the temperature and pressure at which all three states of matter can coexist. Deposition is the reverse process, where a gas turns directly into a solid.

Phase transitions are fundamental to many natural processes and industrial applications. They are also crucial in understanding the behavior of matter under different conditions.