Chemistry

Speed ​​of chemical reactions


Temperature dependence of the reaction rate

The reaction rate (RG) is usually strongly dependent on the temperature. The approach applies to many reactions

RG=k(T)f(Amount of substance concentrations).

k(T) is called the reaction rate constant. “... constant” indicates that the factor k does not depend on the amount of substance of the reaction components involved.

For many organic reactions, a doubling of the reaction rate is observed if, under otherwise identical conditions, the reaction temperature is around 10 K is increased.

Rule of thumb
RG2RGforTT+10K

The temperature dependence of the reaction rate for many reactions can be quantitatively described by an exponential function, the so-called Arrhenius equation.