Arrhenius Equation

Temperature has a very significant effect on the rate of chemical reaction. In general the rate of Chemical reactions increases with the rise in temperature. In most cases, the reaction rate becomes double while in a few cases, it may be even more than double for every 10 K rise in temperature. The value of the temperature coefficient which is the ratio of the rate constants  at the two different temperatures generally lies between 2 and 3.

Temperature coefficient= (rate constant at 310K)/(rate constant at 300K )= 2 to 3

Arrhenius developed a mathematical relationship between temperature and the rate constant. The temperature dependence of the rate constant, k is expressed algebraically as follows.

K  ∝  e^-Ea/RT

K = A e^-Ea/RT

This equation is Known as the Arrhenius equation. 

Here A is known as frequency factor. E_a is the activation energy , R is gas constant and T is the absolute temperature.