| 单词 | simple mixture |
| 释义 | > as lemmassimple mixture 8. Chemistry. The product of the mechanical mixing of two or more substances without chemical change (as opposed to a compound). Also mechanical mixture, simple mixture (originally opposed to chemical mixture).In quot. 1766, applied to a suspension in a liquid as opposed to a solution, though the latter would now also be regarded as a type of mixture. Cf. quot. 1875 at sense A. 5. ΘΚΠ the world > matter > chemistry > chemical admixture or isolation > [noun] > mechanical mixing mixture1766 the world > matter > chemistry > chemical admixture or isolation > [noun] > product of mechanical mixture simple mixture1766 mechanical mixture1887 the world > matter > chemistry > physical chemistry > fluids > [noun] > containing some foreign substance in suspension mixture1766 1766 W. Hamilton in Philos. Trans. 1765 (Royal Soc.) 55 150 I think..we may consider the transparency of a heterogeneous fluid..as the criterion of a true solution, and where that is wanting, it is only a mixture. 1797 Encycl. Brit. XII. 184/1 Chemical mixture is attended with many phenomena which are never observed in simple mixtures. 1812 H. Davy Elements Chem. Philos. 297 These mixtures are more fusible than either of their constituents. 1866 H. E. Roscoe Lessons Elem. Chem. v. 46 The air is a mixture, and not a chemical compound of constituent gases. 1887 I. Remsen Elem. Chem. (1897) i. 9 Mechanical Mixtures and Chemical Compounds.—In a mixture the substances are unchanged... In a chemical compound the substances which are in combination are completely changed. 1912 J. W. Mellor Mod. Inorg. Chem. xix. 359 Metallic rubidium is prepared by heating an intimate mixture of the carbonate with finely divided carbon. 1961 J. N. Anderson Appl. Dental Materials (ed. 2) vi. 56 One such reaction..involves the breakdown as a solid solution at a definite temperature to produce an intimate mechanical mixture of two solids. 1987 K. A. Robinson Chem. Anal. xvii. 654 If enough information is available, all of the components of spectrally unresolved mixtures can be quantified. 1994 W. R. Newman Gehennical Fire iv. 141 Van Helmont asserts that what we would today call a ‘mechanical mixture’, such as the juxtaposition of sand and grains of salt, is not a compound at all, but a ‘bare commingling.’ < as lemmas |
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