vapour pressure


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Related to vapour pressure: saturated vapour pressure

vapour pressure

the pressure exerted by a vapour (gas) that is in equilibrium with its solid or liquid form. The term is particularly important in the diffusion of water vapour.see TRANSPIRATION.
References in periodicals archive ?
Appropriate seasonal vapour pressure limits can ensure that fuel tank vapour space mixtures are always too rich to be flammable so that it would be impossible for an ignition source (such as a faulty electric fuel pump) to cause a vehicle fire.
The new rules, which take effect on April 1, aim to contain dangers by spot-checking the vapour pressure of crude before loading and capping it at 13.7 pounds per square inch (psi) - about normal atmospheric conditions.
Unfortunately measurements of the vapour pressure imposed by the CaS[O.sub.4]-[H.sub.2]O system at high external pressures are not available.
The obtained values of m and n for the test fluids are listed in Table 2 with the percent average absolute deviation, AAD, between predicted and reference vapour pressure, saturated liquid and vapour volume data.
Coefficients for the Antoine vapour pressure equation ln([P.sub.i.sup.0] (kPa)) = [A.sub.i]-[B.sub.i] /(T(K) + [C.sub.i]) (Eq.
Product Sub-Category: Vapour pressure osmometer for plant pathology
The general dependence of the vapour pressure on the emulsion composition is a necessary prerequisite in order to establish the evaporation path.
The parameters a11 and b1 for sulpholane were therefore obtained from the vapour pressure and liquid density.
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