exothermicadj.

/ɛksəʊˈθəːmɪk/

Etymology: < French exothermique (M. Berthelot Essai de mécanique chimique (1879) II. iv. ii. 18), formed as exotherm n. + -ic suffix.

Chemistry.

Characterized by, or attended by, the development of heat; spec. designating an exotherm. Cf. endothermic adj.

ΘΚΠ

the world > matter > chemistry > physical chemistry > thermochemistry > [adjective] > exothermic reactions

exothermic1884

exothermal1906

the world > matter > chemistry > physical chemistry > thermochemistry > [adjective] > exothermic

exothermal1906

exothermic1958

1884 M. M. P. Muir Treat. Princ. Chem. i. iv. 254 To found a system of classification on the difference between exothermic and endothermic changes.

1899 Nature 11 May 40/2 Speculation..as to whether he did not hope that the liberated hydrogen might remove sulphur and phosphorus, notwithstanding the feebly exothermic result of the ensuing combination.

1945 Electronic Engin. 17 670 The individual process of induced transformation is just as likely to be endothermic as exothermic.

1958 Engineering 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.

1962 W. 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.

1964 N. G. Clark Mod. Org. Chem. vi. 108 Ammonia and amines react readily and exothermically with ethylene oxide.

1966 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. II. xxii. 142 It is a refractory substance, strongly exothermic.

Derivatives

exoˈthermically adv.

ΘΚΠ

the world > matter > chemistry > physical chemistry > thermochemistry > [adverb] > exothermic reactions

exothermally1895

exothermically1966

1966 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. II. xxii. 142 They are formed exothermically from the elements.

Draft additions 1993

ˌexotherˈmicity n. the degree to which a reaction is exothermic.

ΚΠ

1961 Webster's 3rd New Internat. Dict. Eng. Lang. Exothermicity.

1965 C. S. G. Phillips & R. J. P. 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.

1977 I. M. Campbell Energy & Atmosphere ix. 358 The exothermicity of reaction..to produce ground state hydroxyl radicals in the lowest vibrational level is 322kJmol⁻¹.

This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018).

单词	exothermic
释义	exothermicadj. /ɛksəʊˈθəːmɪk/ Etymology: < French exothermique (M. Berthelot Essai de mécanique chimique (1879) II. iv. ii. 18), formed as exotherm n. + -ic suffix. Chemistry. Characterized by, or attended by, the development of heat; spec. designating an exotherm. Cf. endothermic adj. ΘΚΠ the world > matter > chemistry > physical chemistry > thermochemistry > [adjective] > exothermic reactions exothermic1884 exothermal1906 the world > matter > chemistry > physical chemistry > thermochemistry > [adjective] > exothermic exothermal1906 exothermic1958 1884 M. M. P. Muir Treat. Princ. Chem. i. iv. 254 To found a system of classification on the difference between exothermic and endothermic changes. 1899 Nature 11 May 40/2 Speculation..as to whether he did not hope that the liberated hydrogen might remove sulphur and phosphorus, notwithstanding the feebly exothermic result of the ensuing combination. 1945 Electronic Engin. 17 670 The individual process of induced transformation is just as likely to be endothermic as exothermic. 1958 Engineering 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. 1962 W. 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. 1964 N. G. Clark Mod. Org. Chem. vi. 108 Ammonia and amines react readily and exothermically with ethylene oxide. 1966 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. II. xxii. 142 It is a refractory substance, strongly exothermic. Derivatives exoˈthermically adv. ΘΚΠ the world > matter > chemistry > physical chemistry > thermochemistry > [adverb] > exothermic reactions exothermally1895 exothermically1966 1966 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. II. xxii. 142 They are formed exothermically from the elements. Draft additions 1993 ˌexotherˈmicity n. the degree to which a reaction is exothermic. ΚΠ 1961 Webster's 3rd New Internat. Dict. Eng. Lang. Exothermicity. 1965 C. S. G. Phillips & R. J. P. 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. 1977 I. M. Campbell Energy & Atmosphere ix. 358 The exothermicity of reaction..to produce ground state hydroxyl radicals in the lowest vibrational level is 322kJmol⁻¹. This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018). < adj.1884
随便看	to burn off to burn on to burn one's boats to burn one's bridges to burn one's bridges behind one to burn one's candle at both ends to burn one's fingers to burn one's foot to burn one's poker to burn one's ships to burn oneself out to burn out to burn out of house and home to burn out, forth to burn rubber to burn seasonable weather to burn the candle at both ends to burn the earth or wind to burn the ground bare to burn the ken to burn the midnight oil to burn the mill to burn the planks to burn the rump to burn the thames