TyroCity

Chemistry 12 Notes for Chemistry Notes

Posted on

Arhenius Equation Dependence Of Rate On Temperature

The variation of rate or reaction on temperature is given by Arhenius equation. This eqn is:

Image 1

where,

k = Rate constant
Eact = Activation energy
R = Universal gas constant
T = Temperature in Kelvin
A = Constant called Arhenius factor

Image 2

In a graph of lnk is plotted against 1/T it gives a straight line having y-intercept value lnA and slope -Eact/RT.

This shows that the rate constant is directly proportional to rate of reaction increase in temperature causes increase in rate of reaction.

If k1 and k2 are rate constant of a given reaction at T1 & T2.

Then,

Image3

From equation (i) and (ii) we get,

Image 4

Latest comments (0)