Chemistry - Chemical Kinetics Question with Solution | TestHub

The rate of a chemical reaction is significantly affected by a change in temperature. For most chemical reactions, the rate usually doubles or triples for each 10°C rise in temperature. This occurs because an increase in temperature increases the number of effective collisions. Consequently, the fraction of molecules possessing energy greater than or equal to the threshold energy increases appreciably, resulting in a significant increase in the reaction rate. The quantitative dependence of reaction rate on temperature is given by the Arrhenius equation:

$k=A\exp \left(-\frac{E_a}{RT}\right)$

In this equation, $E_a$ is the activation energy of the reaction. (antilog 0.3931 = 2.472)