| 释义 |
exothermic, a. Chem.|ɛksəʊˈθɜːmɪk|
[ad. F. exothermique (M. Berthelot Essai de mécanique chimique (1879) II. iv. ii. 18), f. as prec. + -ic.]
Characterized by, or attended by, the development of heat; spec. designating an exotherm. Cf. endothermic a. Hence exoˈthermically adv.
1884,1945[see endothermic a.]. 1958Engineering 4 Apr. 431/2 The neutral hydrogen mesic atoms drift around and can exchange their muons with deuterium atoms. The exothermic nature of this exchange makes it highly probable. 1962W. B. Thompson Introd. Plasma Physics iv. 58 It is known that many exothermic nuclear reactions with high intrinsic cross sections are inhibited at low energies by the Coulomb repulsion between the like charges on the nuclei. 1964N. G. Clark Mod. Org. Chem. vi. 108 Ammonia and amines react readily and exothermically with ethylene oxide. 1966Phillips & Williams Inorg. Chem. II. xxii. 142 They are formed exothermically from the elements. Ibid., It is a refractory substance, strongly exothermic.
Add: ˌexotherˈmicity n., the degree to which a reaction is exothermic.
1961Webster, Exothermicity. 1965Phillips & Williams Inorg. Chem. I. xiii. 505 The exothermicity of mixed-oxide formation will depend to a great extent upon the acid and base character of the component oxides. 1977I. M. Campbell Energy & Atmosphere ix. 358 The exothermicity of reaction..to produce ground state hydroxyl radicals in the lowest vibrational level is 322kJmol-1. |