Bubble Point


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bubble point

[′bəb·əl ‚pȯint]
(physical chemistry)
In a solution of two or more components, the temperature at which the first bubbles of gas appear. Also known as boiling point.

Bubble Point

 

(or boiling point), the temperature at which the transition to vapor begins for a solution of given composition in the liquid phase. The bubble point is generally lower than the condensation temperature, at which a vapor of the same composition begins condensing into the liquid phase. Azeotropic mixtures, for which the two temperatures are equal, are an exception.

The relation of the bubble and condensation points of solutions to the compositions of the solutions is determined by Raoult’s laws and Konovalov’s rules and can be graphically represented by a phase diagram. The elevation of the bubble point of a solution compared with the boiling point of the pure solvent is studied in ebulliometry.

References in periodicals archive ?
where d is the pore diameter, [tau] is the surface tension of the liquid, [theta] is the contact angle between liquid and membrane surface (assumed to be 0 in case of full wetting, which means cos[theta] = 1), and [p.sub.BP] the bubble point pressure.
POROMETER 3G (Quantachrome) was used to measure the bubble point pressure and pore sizes by a wet-dry flow method.
With high-glide zeotropic refrigerants, care must be taken to use bubble point to calculate subcooling, and dew point to calculate superheat.
The pore size of a microporous membrane is typically measured using a technique called bubble point. Bubble point is the minimum pressure at which a wetted membrane allows a constant stream of air bubbles through it.
If there is a transition from bubble point to dew point saturation conditions over the calculation interval, the GOC depth will be estimated.
(2-6) EU Annex 1, paragraph 113, however, states: "The integrity of the sterilized filter should be verified before use and should be confirmed immediately after use by an appropriate method such as bubble point, diffusive flow or pressure hold test." (7) The paragraph, in its first sentence, recommends the uncommon and potentially hazardous pre-use/poststerilization integrity test.
Undersaturated oil viscosity correlations, which usually use saturated crude oil viscosity and pressure above the bubble point to predict viscosity of undersaturated oil reservoirs.
The binary interaction parameter, which was fit to the two-phase data, and the pure component parameters were then used to predict a three-phase bubble point pressure.
Those who believe there is a bubble point out that such buyers likely won't have savings to bail them out; the Commerce Department's Bureau of Economic Analysis reported in recent weeks that the net average savings for Americans has hit zero.
The Clamp-On Porometer measures the bubble point, mean flow pore diameter, pore size distribution, gas permeability, and envelope surface area, but does not require a sample to be cut out from the bulk material.
In this way, bubble point measurements on a sample of fixed composition were obtained.