enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Humidity - Wikipedia

    en.wikipedia.org/wiki/Humidity

    Humidity indicates the likelihood for precipitation, dew, or fog to be present. Humidity depends on the temperature and pressure of the system of interest. The same amount of water vapor results in higher relative humidity in cool air than warm air. A related parameter is the dew point. The amount of water vapor needed to achieve saturation ...

  3. Water activity - Wikipedia

    en.wikipedia.org/wiki/Water_activity

    The resistance is directly proportional to relative air humidity and therefore also to water activity of the sample (once vapor–liquid equilibrium is established). This relation can be checked by either verification or calibration using saturated salt-water mixtures, which provide a well-defined and reproducible air humidity in the ...

  4. Vapor–liquid equilibrium - Wikipedia

    en.wikipedia.org/wiki/Vapor–liquid_equilibrium

    The concentration of a vapor in contact with its liquid, especially at equilibrium, is often expressed in terms of vapor pressure, which will be a partial pressure (a part of the total gas pressure) if any other gas(es) are present with the vapor. The equilibrium vapor pressure of a liquid is in general strongly dependent on temperature. At ...

  5. Vapor pressure - Wikipedia

    en.wikipedia.org/wiki/Vapor_pressure

    Relative humidity is defined relative to saturation vapor pressure. [18] Equilibrium vapor pressure does not require the condensed phase to be a flat surface; it might consist of tiny droplets possibly containing solutes (impurities), such as a cloud.

  6. Moisture sorption isotherm - Wikipedia

    en.wikipedia.org/wiki/Moisture_sorption_isotherm

    The relationship between water content and equilibrium relative humidity of a material can be displayed graphically by a curve, the so-called moisture sorption isotherm. For each humidity value, a sorption isotherm indicates the corresponding water content value at a given temperature. If the composition or quality of the material changes, then ...

  7. Properties of water - Wikipedia

    en.wikipedia.org/wiki/Properties_of_water

    A saturated gas or one with 100% relative humidity is when the vapor pressure of water in the air is at equilibrium with vapor pressure due to (liquid) water; water (or ice, if cool enough) will fail to lose mass through evaporation when exposed to saturated air.

  8. Water vapor - Wikipedia

    en.wikipedia.org/wiki/Water_vapor

    Humidity is the amount of water vapor in the air. The vapor content of air is measured with devices known as hygrometers. The measurements are usually expressed as specific humidity or percent relative humidity. The temperatures of the atmosphere and the water surface determine the equilibrium vapor pressure; 100% relative humidity occurs when ...

  9. Köhler theory - Wikipedia

    en.wikipedia.org/wiki/Köhler_theory

    Since the relative humidity is above 100%, the droplet will grow until it is in thermodynamic equilibrium. As the droplet grows, it never encounters equilibrium, and thus grows without bound, as long as the level of supersaturation is maintained. However, if the supersaturation is only 0.3%, the drop will only grow until about 0.5 micrometers.