The RGT rule ( R eaktions g eschwindigkeit- T emperature control, even van 't Hoff-rule ) is a rule of thumb, the chemical kinetics , allowing the estimation of many phenomena of chemistry , biochemistry and ecology . It says that chemical reactions take place twice to three times as fast at a temperature increased by 10 K.
The factor by which the reaction speed increases when the temperature is increased by 10 K is called the value:
And denote the respective reaction rate constants at the temperature or . With larger temperature differences, the RGT rule becomes increasingly imprecise and therefore generally no longer applies here.
The RGT rule was established in 1884 by the Dutch chemist Jacobus Henricus van 't Hoff and expanded into the Arrhenius equation in 1889 by Svante Arrhenius .
- AF Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 , p. 198.