exothermn.

/ˈɛksəʊθəːm/

Etymology: < Greek ἔξω exo- prefix + θέρμη heat; compare exothermic adj.

Chemistry.

A compound which liberates heat during its formation and which absorbs heat or energy during its decomposition.

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

exotherm1909

1909 Cent. Dict. Suppl. Exotherm.

1954 Electronic Engin. 26 139 It is possible to control the exotherm by maintaining the resin and the hardener at a low temperature.

Derivatives

exoˈthermal adj. = exothermic adj.

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

exothermal1906

exothermic1958

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

exothermic1884

exothermal1906

1906 A. Smith Introd. Gen. Inorg. Chem. ii. 27 Exothermal actions, as those which produce heat are called, are usually of the spontaneous order.

1959 Jrnl. Iron & Steel Inst. 192 389/3 Compositions and physical properties of insulating firebricks and fireclay bricks are compared, and compositions and exothermal qualities..are given.

exoˈthermally adv.

ΘΚΠ

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

exothermally1895

exothermically1966

1895 C. S. Palmer tr. W. Nernst Theoret. Chem. iv. v. 584 The direction of the chemical change does not necessarily coincide with the direction in which the reaction progresses exothermally.

1965 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. I. xiii. 506 Water reacts exothermally with very many oxides.

Draft additions 1993

2. A sudden liberation of heat observed in the course of an experiment or (esp. industrial) process.

ΚΠ

1960 Textile Res. Jrnl. 30 624/2 The sharp exotherm now occurs at 272°C instead of 308°C.

1983 Daily Tel. 12 Dec. 19/3 (advt.) The inclusion of fillers, particularly metallic ones, in thermosetting plastics is a known and recognised practice for reducing and dissipating exotherm.

1984 D. G. Bew in C. A. Heaton Introd. Industr. Chem. iv. 108 Cooling water is required to remove reaction exotherms.

This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018).

单词	exotherm
释义	exothermn. /ˈɛksəʊθəːm/ Etymology: < Greek ἔξω exo- prefix + θέρμη heat; compare exothermic adj. Chemistry. A compound which liberates heat during its formation and which absorbs heat or energy during its decomposition. ΘΚΠ the world > matter > chemistry > physical chemistry > thermochemistry > [noun] > exothermic reactions exotherm1909 1909 Cent. Dict. Suppl. Exotherm. 1954 Electronic Engin. 26 139 It is possible to control the exotherm by maintaining the resin and the hardener at a low temperature. Derivatives exoˈthermal adj. = exothermic adj. ΘΚΠ the world > matter > chemistry > physical chemistry > thermochemistry > [adjective] > exothermic exothermal1906 exothermic1958 the world > matter > chemistry > physical chemistry > thermochemistry > [adjective] > exothermic reactions exothermic1884 exothermal1906 1906 A. Smith Introd. Gen. Inorg. Chem. ii. 27 Exothermal actions, as those which produce heat are called, are usually of the spontaneous order. 1959 Jrnl. Iron & Steel Inst. 192 389/3 Compositions and physical properties of insulating firebricks and fireclay bricks are compared, and compositions and exothermal qualities..are given. exoˈthermally adv. ΘΚΠ the world > matter > chemistry > physical chemistry > thermochemistry > [adverb] > exothermic reactions exothermally1895 exothermically1966 1895 C. S. Palmer tr. W. Nernst Theoret. Chem. iv. v. 584 The direction of the chemical change does not necessarily coincide with the direction in which the reaction progresses exothermally. 1965 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. I. xiii. 506 Water reacts exothermally with very many oxides. Draft additions 1993 2. A sudden liberation of heat observed in the course of an experiment or (esp. industrial) process. ΚΠ 1960 Textile Res. Jrnl. 30 624/2 The sharp exotherm now occurs at 272°C instead of 308°C. 1983 Daily Tel. 12 Dec. 19/3 (advt.) The inclusion of fillers, particularly metallic ones, in thermosetting plastics is a known and recognised practice for reducing and dissipating exotherm. 1984 D. G. Bew in C. A. Heaton Introd. Industr. Chem. iv. 108 Cooling water is required to remove reaction exotherms. This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018). < n.1895
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