phase rulen.

Brit.

/ˈfeɪz ruːl/, U.S.

/ˈfeɪz ˌrul/

Origin: Formed within English, by compounding. Etymons: phase n.², rule n.¹

Etymology: < phase n.² (see phase n.² 4) + rule n.¹The rule was first formulated by J. Willard Gibbs in 1875 ( Trans. Connecticut Acad. 3 152; compare quot. 1875 at phase n.² 4). Compare Gibbs n.

Physical Chemistry.

A rule, commonly written P + F = C + 2, relating the possible numbers of phases (P), components (C), and degrees of freedom (F) in a chemical system.

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the world > matter > chemistry > physical chemistry > phases > [noun] > rule

Gibbs phase rule1896

phase rule1896

1896 Jrnl. Chem. Soc. 70 ii. 415 Only at some one definite temperature would all four salts tend to coexist in an unchanged condition. This point is, in the case of solutions of the salts, a sextuple point in the sense of the phase rule.

1935 Discovery Sept. 258/2 A system so complex as to baffle the most ardent exponent of the phase rule.

1988 J. D. Barrow & F. J. Tipler Anthropic Cosmol. Princ. (rev. ed.) iii. 147 Henderson argued that an application of Gibbs' Phase Rule, a general theorem of thermodynamics which is so fundamental that it is unlikely ever to be overthrown, indicated that the elemental properties were indeed independent.

2001 R. W. Cahn Coming of Materials Sci. viii. 328 A state with two liquid phases and one crystalline phase should be temperature-variant according to the phase rule.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	phase rule
释义	phase rulen. Brit. /ˈfeɪz ruːl/, U.S. /ˈfeɪz ˌrul/ Origin: Formed within English, by compounding. Etymons: phase n.², rule n.¹ Etymology: < phase n.² (see phase n.² 4) + rule n.¹The rule was first formulated by J. Willard Gibbs in 1875 ( Trans. Connecticut Acad. 3 152; compare quot. 1875 at phase n.² 4). Compare Gibbs n. Physical Chemistry. A rule, commonly written P + F = C + 2, relating the possible numbers of phases (P), components (C), and degrees of freedom (F) in a chemical system. ΘΚΠ the world > matter > chemistry > physical chemistry > phases > [noun] > rule Gibbs phase rule1896 phase rule1896 1896 Jrnl. Chem. Soc. 70 ii. 415 Only at some one definite temperature would all four salts tend to coexist in an unchanged condition. This point is, in the case of solutions of the salts, a sextuple point in the sense of the phase rule. 1935 Discovery Sept. 258/2 A system so complex as to baffle the most ardent exponent of the phase rule. 1988 J. D. Barrow & F. J. Tipler Anthropic Cosmol. Princ. (rev. ed.) iii. 147 Henderson argued that an application of Gibbs' Phase Rule, a general theorem of thermodynamics which is so fundamental that it is unlikely ever to be overthrown, indicated that the elemental properties were indeed independent. 2001 R. W. Cahn Coming of Materials Sci. viii. 328 A state with two liquid phases and one crystalline phase should be temperature-variant according to the phase rule. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1896
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