3.1 Effect of temperature on rate of reaction

  Chemical Kinetics

The effect of temperature on rate of a reaction is expressed in terms of temperature coefficient which is defined as the ratio of rate of reaction at two different temperature differing by ${10^ \circ }C$.

Generally, temperatures are taken as ${25^ \circ }C$ and ${35^ \circ }C$ i.e., $${\text{Temperature coefficient}} = \frac{{{K_t} + 10}}{{{K_t}}}$$ For most of the reactions, value comes between $2$ and $3$.

Note: However, the method of temperature coefficient to study the effect of temperature on rate of a reaction is not exactly correct. Effect of temperature is explained using Arrhenius equation later in the chapter.