What is condensation, how does it occur in nature and what does it lead to?

What is condensation, how does it occur in nature and what does it lead to?

  1. Condensation # 769.Various vapor (Latin condense condense, thicken) the transition of the substance into a liquid or solid state from the gaseous. The temperature below which condensation takes place is called critical. Steam, from which condensation can occur, is saturated or unsaturated.
    Types of condensation

    Ratios for different types of condensation are derived on the basis of experimental data, as well as statistical physics and thermodynamics.

    Saturated Vapor Pressure

    In the presence of a liquid phase of the substance, condensation occurs at arbitrarily small supersaturations and very rapidly. In this case, a mobile equilibrium arises between the evaporating liquid and the condensing vapors. The Clausius Clausius equation determines the parameters of this equilibrium in particular, the release of heat during condensation, and the cooling upon evaporation.

    Condensation of supersaturated vapor

    Presence of supersaturated steam is possible in the following cases:

    * absence of a liquid or solid phase of the same substance.
    * absence of condensation nuclei of suspended solids or droplets of liquid suspended in the atmosphere, as well as ions (the most active condensation nuclei).
    * condensation in the atmosphere of another gas in this case the condensation rate is limited by the rate of diffusion of vapors from the gas to the surface of the liquid.

    The device of nuclear physics the cloud chamber is based on the phenomenon of condensation on ions.

    In the absence of condensation nuclei, supersaturation can reach 8001000 and more than one percent. In this case, condensation begins in fluctuations in the vapor density (points of random condensation of matter).

    Condensation of unsaturated vapor

    Condensation of unsaturated steam is possible in the presence of powdery or solid porous bodies. The curve (in this case a concave surface) changes the equilibrium pressure and initiates capillary condensation.

    Condensation to the solid phase

    Condensation, bypassing the liquid phase, occurs through the formation of small crystals (desublimation). This is possible in the case of vapor pressure below the pressure at the triple point at a lower temperature.

  2. Hello!
    Condensation is the transition of matter from the gaseous state of matter to liquid. Two conditions are necessary for the condensation of water vapor in the atmosphere:
    1) Saturation of air with water vapor (this occurs when the temperature is lowered);
    2) Presence of condensation nuclei - particles of microaerosols, on which deposition of microdroplets of water will occur, see about microbalance:
    (in air free from microaerosols, condensation does not occur even under supersaturation).
    When condensation of water vapor on the surface of the Earth, dew is observed, condensation in the lower layer of the atmosphere is accompanied by fog, while condensation of water vapor at altitudes - clouds of different shapes and at different altitudes (see annex), which bring precipitation to Earth. At a negative temperature of air, a direct transition of water vapor to crystals (sublimation) takes place and accordingly there is a frost on the Earth, a frosty fog in the lower layer of the atmosphere, and clouds form at the altitudes, consisting of crystals. An interesting form of clouds and anthropogenic - Peristomocumulus condensation (Cc tract), caused by a span of the samolta at high altitudes, caused by the sublimation of steam on the combustion products emitted by the engines of the jet, see my answer to the question:
    The important and fundamental role of condensation for life on land is that condensation forms sediments falling to the Earth - there are no other ways of moisture entering land, and without them the whole land of the Earth would turn into a dead and lifeless desert!
    All the best.
  3. Well, in nature it's precipitation (rain, snow)
    And at home, couples "sit down" on the cold pipes and on the glass (windows)
  4. this is the process of converting steam to liquid. in a shower it leads to rain.

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