Saturation Vapor Pressure

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saturation vapor pressure

[‚sach·ə′rā·shən ′vā·pər ‚presh·ər]
The vapor pressure of a thermodynamic system, at a given temperature, wherein the vapor of a substance is in equilibrium with a plane surface of that substance's pure liquid or solid phase.

Saturation Vapor Pressure


in meteorology, the maximum possible vapor pressure at a given temperature. The higher the air temperature, the greater the saturation vapor pressure. The condensation of water vapor begins after the saturation vapor pressure is reached. The saturation vapor pressure is greater over supercooled water than over ice at the same temperature; it is greater over a convex water surface and smaller over a concave water surface than over a plane water surface. At a temperature of 30°C the saturation vapor pressure does not exceed 42.4 millibars; at 0°C it is 6.1 millibars, and at – 20°C it is equal to 1.27 millibars over water and 1.03 millibars over ice (1 millibar = 102 newtons per m2).

References in periodicals archive ?
VPD is an absolute measure of the state of atmospheric moisture, specifically the difference between the saturation vapor pressure and the actual vapor pressure of the atmosphere (Seagaret al.
Summary: In this paper, a series of adipates were synthesized and used as phase stabilizer and saturation vapor pressure depressor of methanol-gasoline.
Where T dp is dew point temperature, es is saturation vapor pressure and rh is relative humidity.
9 psia) Note: [phi] for below 0[degrees]C (32[degrees]F) temperatures in this table was calculated with reference to the saturation vapor pressure over ice in the denominator of Equation 2.
The slope of saturation vapor pressure curve ([DELTA]) was calculated by equation (4):
The formation of vapor bubbles occurs within a flowing liquid in regions where the local pressure falls below the liquid's saturation vapor pressure.
Water vapor is by far the most important, but the amount of water vapor in the atmosphere is closely regulated by temperature as described by the Clausius-Clapyron equation for saturation vapor pressure.
Chemicals tend to stimulate at equal fractions of their saturation vapor pressure.
The saturation vapor pressure is related to temperature and can be determined by the following equation (ASCE, 2005)
Boiling is an extreme form of evaporation that occurs when the saturation vapor pressure is equal to the total atmospheric pressure.
Summary: To explore new and multifunctional additives for methanol-gasoline glycolic esters were synthesized and screened as phase stabilizer and saturation vapor pressure depressor.