| 释义 |
molecularity|məʊlɛkjʊˈlærɪtɪ|
[f. molecular a. + -ity.]
1. The quality or state of being molecular; also, molecular agencies generally.
1842Penny Cycl. XXIV. 335/2 Theories of molecularity. 1871H. Marshall For very Life I. i. xvii. 123 Human will has knit particles together as close and tight as molecularity could.
2. Chem. The number of reacting molecules involved in a (real or postulated) single step of a chemical reaction.
1939Fowler & Guggenheim Statist. Thermodynamics xii. 500 In general there is no simple connection between the molecularity of the mechanism..and the order of the reaction. 1950K. J. Laidler Chem. Kinetics iii. 56 Whereas the order of a reaction is deduced directly from the experimental results, the molecularity can be determined only on the basis of additional arguments about which there is sometimes some uncertainty. 1970Prettre & Claudel Elem. Chem. Kinetics v. 64 If we accept that the reaction I2 + H2→2HI is a simple one, this means that it involves a molecule of iodine and a molecule of hydrogen and that consequently its molecularity is two. |