fugacityn.

Brit.

/fjuːˈɡasᵻti/, U.S.

/fjuˈɡæsədi/

Etymology: formed as fugacious adj. + -ty suffix¹.

The quality of being fugacious; instability; transitoriness. Of a material substance: Volatility.

ΘΚΠ

the world > time > duration > shortness or brevity in time > swift movement of time > [noun] > transience

frailnessa1300

timelinessa1500

transitoriness1550

fleeting1616

temporality1635

wanzingness1642

transiency1647

impermanency1648

undurableness1648

transientness1653

fugacity1656

evanidness1659

fugaciousness1664

timeishness1674

timesomeness1674

volatilenessa1676

fleetingness1709

deciduousness1727

fleetness1727

momentaneousness1727

preterience1730

transience1739

evanescence1751

unpermanency1751

transitiveness1775

caducity1793

impermanence1796

ephemerality1822

passingness1839

transitionalness1880

anitya1882

diariness1891

anicca1904

ephemeralness1911

the world > movement > motion in a certain direction > going away > [noun] > flight or running away > condition of

fugacyc1600

fugacity1656

fugitivity1843

fugitivism1877

the world > matter > gas > becoming or making into gas > [noun] > becoming or making into vapour > ability to become vapour > volatility

volatility1626

fugacity1656

fugitivenessa1661

volatilenessa1676

fugaciousness1875

1656 T. Blount Glossographia Fugacity, a readiness to run away, inconstancy, an inclination to flight.

1666 R. Boyle Origine Formes & Qualities 190 By our Experiment, its Fugacity is so restrain'd, that..the Caput mortuum..endured a good fire in the Retort.

1751 S. Johnson Rambler No. 143. ⁋3 The deceitfulness of hope, the fugacity of pleasure, the fragility of beauty.

1807 F. Wrangham Serm. Transl. Script. 31 Considerations of the fugacity of time.

1830 J. Lindley Introd. Nat. Syst. Bot. 288 The acrid principle..notwithstanding its fugacity, has been lately obtained pure.

1841–44 R. W. Emerson Poet in Ess. (1885) II. 321 The accidency and fugacity of the symbol.

1868 H. Bushnell Serm. Living Subj. 281 The fugacities are left behind us.

in combination.1894 Brit. Jrnl. Photogr. 41 68 The fugacity-producing quality of this bath.

Draft additions 1993

2. Physical Chemistry. A thermodynamic property of a (real) gas which is defined in such a way that substituting it for the pressure or partial pressure in the equations for an ideal gas gives equations applicable to the real gas; a thermodynamic property of a liquid or solid defined by the same function, μ = RT ln f + μ₀ (where μ is the chemical potential, T the temperature, f the fugacity, and μ₀ is a function of temperature only). See also oxygen fugacity n. at oxygen n. Compounds 2.

ΘΚΠ

the world > matter > chemistry > physical chemistry > gaseous phase > [noun] > gas > properties > thermodynamic

fugacity1902

1902 G. N. Lewis in Proc. Amer. Acad. Arts & Sci. 37 54 Every molecular species may be considered..to have a tendency to escape from the phase in which it is. In order to express this tendency quantitatively for any particular state,..the quantity which we shall use..will be called the fugacity.

1915 E. W. Washburn Princ. Physical Chem. xxv. 361 If we imagine any phase within a given system to be gradually broken up into smaller and smaller particles, then as the size of these particles gradually decreases the surface of contact between this phase and its neighbors will correspondingly increase and the effects of forces of the nature of surface tension..will gradually become more apparent, and these surface forces will eventually begin to be an important factor in determining the fugacities of the molecular species composing the system. Whenever this situation exists to an appreciable extent..we have what is called a disperse system or a dispersoid.

1949 J. R. Partington Adv. Treat. Physical Chem. I. vii. 721 Fugacities in mixtures may be calculated on the assumption that the fugacity is equal to the mol fraction times the fugacity of the pure gas at the same temperature and total pressure.

1969 K. H. Wedepohl et al. Handbk. Geochem. I. iii. 41 Fugacity has..a wider meaning, applicable to solids and liquids as well as gases. It is most easily visualized as a vapor pressure, or more precisely the vapor pressure a substance would exert if its vapor behaved as a perfect gas.

1986 Scripta Metallurgica 20 654 The formation of blisters at the Al–Al₂O₃ interface upon exposure to the gaseous H₂..provides a means of estimating the hydrogen fugacity in the environmental cell under the electron beam.

Draft additions 1993

fugacity coefficient n. Physical Chemistry the ratio of fugacity to pressure for a particular gas.

ΘΚΠ

the world > matter > chemistry > physical chemistry > gaseous phase > [noun] > gas > properties > thermodynamic > fugacity coefficient

fugacity coefficient1949

1949 Redlich & Kwong in Chem. Rev. 44 237 It is convenient to call the quotient of the fugacity and the pressure ‘fugacity coefficient’.

1966 Industr. & Engin. Chem.: Fund. 5 455/1 Three methods of calculating fugacity coefficients in multicomponent mixtures..take into account abnormal interaction effects between unlike molecules by utilizing binary mixture data.

1984 J. Pennington in C. A. Heaton Introd. Industr. Chem. viii. 283 At higher pressures the fugacities of components must be obtained from published data or by applying a ‘fugacity coefficient’, ϕ = f/p, derived from a generalized chart.

This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2022).

单词	fugacity
释义	fugacityn. Brit. /fjuːˈɡasᵻti/, U.S. /fjuˈɡæsədi/ Etymology: formed as fugacious adj. + -ty suffix¹. The quality of being fugacious; instability; transitoriness. Of a material substance: Volatility. ΘΚΠ the world > time > duration > shortness or brevity in time > swift movement of time > [noun] > transience frailnessa1300 timelinessa1500 transitoriness1550 fleeting1616 temporality1635 wanzingness1642 transiency1647 impermanency1648 undurableness1648 transientness1653 fugacity1656 evanidness1659 fugaciousness1664 timeishness1674 timesomeness1674 volatilenessa1676 fleetingness1709 deciduousness1727 fleetness1727 momentaneousness1727 preterience1730 transience1739 evanescence1751 unpermanency1751 transitiveness1775 caducity1793 impermanence1796 ephemerality1822 passingness1839 transitionalness1880 anitya1882 diariness1891 anicca1904 ephemeralness1911 the world > movement > motion in a certain direction > going away > [noun] > flight or running away > condition of fugacyc1600 fugacity1656 fugitivity1843 fugitivism1877 the world > matter > gas > becoming or making into gas > [noun] > becoming or making into vapour > ability to become vapour > volatility volatility1626 fugacity1656 fugitivenessa1661 volatilenessa1676 fugaciousness1875 1656 T. Blount Glossographia Fugacity, a readiness to run away, inconstancy, an inclination to flight. 1666 R. Boyle Origine Formes & Qualities 190 By our Experiment, its Fugacity is so restrain'd, that..the Caput mortuum..endured a good fire in the Retort. 1751 S. Johnson Rambler No. 143. ⁋3 The deceitfulness of hope, the fugacity of pleasure, the fragility of beauty. 1807 F. Wrangham Serm. Transl. Script. 31 Considerations of the fugacity of time. 1830 J. Lindley Introd. Nat. Syst. Bot. 288 The acrid principle..notwithstanding its fugacity, has been lately obtained pure. 1841–44 R. W. Emerson Poet in Ess. (1885) II. 321 The accidency and fugacity of the symbol. 1868 H. Bushnell Serm. Living Subj. 281 The fugacities are left behind us. in combination.1894 Brit. Jrnl. Photogr. 41 68 The fugacity-producing quality of this bath. Draft additions 1993 2. Physical Chemistry. A thermodynamic property of a (real) gas which is defined in such a way that substituting it for the pressure or partial pressure in the equations for an ideal gas gives equations applicable to the real gas; a thermodynamic property of a liquid or solid defined by the same function, μ = RT ln f + μ₀ (where μ is the chemical potential, T the temperature, f the fugacity, and μ₀ is a function of temperature only). See also oxygen fugacity n. at oxygen n. Compounds 2. ΘΚΠ the world > matter > chemistry > physical chemistry > gaseous phase > [noun] > gas > properties > thermodynamic fugacity1902 1902 G. N. Lewis in Proc. Amer. Acad. Arts & Sci. 37 54 Every molecular species may be considered..to have a tendency to escape from the phase in which it is. In order to express this tendency quantitatively for any particular state,..the quantity which we shall use..will be called the fugacity. 1915 E. W. Washburn Princ. Physical Chem. xxv. 361 If we imagine any phase within a given system to be gradually broken up into smaller and smaller particles, then as the size of these particles gradually decreases the surface of contact between this phase and its neighbors will correspondingly increase and the effects of forces of the nature of surface tension..will gradually become more apparent, and these surface forces will eventually begin to be an important factor in determining the fugacities of the molecular species composing the system. Whenever this situation exists to an appreciable extent..we have what is called a disperse system or a dispersoid. 1949 J. R. Partington Adv. Treat. Physical Chem. I. vii. 721 Fugacities in mixtures may be calculated on the assumption that the fugacity is equal to the mol fraction times the fugacity of the pure gas at the same temperature and total pressure. 1969 K. H. Wedepohl et al. Handbk. Geochem. I. iii. 41 Fugacity has..a wider meaning, applicable to solids and liquids as well as gases. It is most easily visualized as a vapor pressure, or more precisely the vapor pressure a substance would exert if its vapor behaved as a perfect gas. 1986 Scripta Metallurgica 20 654 The formation of blisters at the Al–Al₂O₃ interface upon exposure to the gaseous H₂..provides a means of estimating the hydrogen fugacity in the environmental cell under the electron beam. Draft additions 1993 fugacity coefficient n. Physical Chemistry the ratio of fugacity to pressure for a particular gas. ΘΚΠ the world > matter > chemistry > physical chemistry > gaseous phase > [noun] > gas > properties > thermodynamic > fugacity coefficient fugacity coefficient1949 1949 Redlich & Kwong in Chem. Rev. 44 237 It is convenient to call the quotient of the fugacity and the pressure ‘fugacity coefficient’. 1966 Industr. & Engin. Chem.: Fund. 5 455/1 Three methods of calculating fugacity coefficients in multicomponent mixtures..take into account abnormal interaction effects between unlike molecules by utilizing binary mixture data. 1984 J. Pennington in C. A. Heaton Introd. Industr. Chem. viii. 283 At higher pressures the fugacities of components must be obtained from published data or by applying a ‘fugacity coefficient’, ϕ = f/p, derived from a generalized chart. This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2022). < n.1656
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