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Related to Fugacity coefficient: Activity coefficient


1. Passing away quickly; evanescent.
2. Botany Withering or dropping off early.

[From Latin fugāx, fugāc-, from fugere, to flee.]

fu·ga′cious·ly adv.
fu·gac′i·ty (-găs′ĭ-tē) n.


1. (General Physics) thermodynamics Also called: escaping tendency a property of a gas, related to its partial pressure, that expresses its tendency to escape or expand, given by d(logef) = dμ/RT, where μ is the chemical potential, R the gas constant, and T the thermodynamic temperature. Symbol: f
2. (Botany) the state or quality of being fugacious


the condition of being fugacious or transitory; evanescence. — fugacious, adj.
See also: Decaying
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.fugacity - the tendency of a gas to expand or escape
physical property - any property used to characterize matter and energy and their interactions
2.fugacity - the lack of enduring qualities (used chiefly of plant parts)
plant life, flora, plant - (botany) a living organism lacking the power of locomotion
transience, transiency, transitoriness - an impermanence that suggests the inevitability of ending or dying
References in periodicals archive ?
A convenient alternative is to start with the pure-component fugacity at the saturation pressure, [f.sup.pure.sub.w] (T, [p.sup.sat]), which typically differs by only a small correction from the readily available pure-component vapor pressure [p.sup.sat](T) [[f.sup.pure.sub.w] (T, [p.sup.sat]) = [[phi].sup.sat][p.sup.sat], where [[phi].sup.sat.sub.w](T, [p.sup.sat]), the fugacity coefficient at saturation, is 1 for an ideal gas and typically slightly less than 1 for low and moderate pressures].
Furthermore, Redlich-Kwong state equation was used by the authors to calculate ethane fugacity coefficient. The activity coefficient of each solvent was calculated using a combination of Redlich-Kister equation with three parameters and the Gibbs-Duhem equation.
where, [x.sub.i.sup.L] and [x.sub.i.sup.F] are the compositions of component i in the liquid and fluid phases and [[bar.[empty set]].sub.i] is the fugacity coefficient of component i.
where [a.sub.H] is the activity at the atom ratio [x.sub.H] in the single-phase Pd-H solid solution and [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] are the fugacity and pressure of hydrogen in the equilibrium gas; [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] is the fugacity coefficient.