Is the fog formed by liquefaction?

When the relative humidity reaches 100%, the water vapor in the air will condense into fine water droplets suspended in the air, which will reduce the visibility on the ground. This weather phenomenon is called fog.

Most of them appear between February and April in spring. Forming conditions: cooling, humidifying and increasing water vapor content. There are radiation fog, advection fog, mixed fog and evaporation fog.

Extended data:

Formation mechanism of liquefaction:

The process of changing a substance from a gaseous state to a liquid state. Liquefaction is the reverse process of vaporization. Gas molecules attract each other and condense into liquid. When a substance is liquefied, it gives off heat. Gases below the critical temperature can be liquefied. Liquefaction can be achieved by pressurization or cooling, or by pressurization and cooling.

Gases with critical temperature higher than or close to room temperature, such as ether, chlorine, ammonia, sulfur dioxide, carbon dioxide and some hydrocarbons, can be liquefied by compression at room temperature. Gases with very low critical temperature, such as oxygen, nitrogen, hydrogen and helium. Before being liquefied by isothermal compression, it must be cooled to below their critical temperature.

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