Showing posts with label first order reaction. Show all posts
Showing posts with label first order reaction. Show all posts

Derive an expression for the rate constant of a first order reaction. Give its units.

Let us consider a first order reaction,

A → product

Suppose at the beginning of the reaction, that is, when t=0, the concentration of A is amolL and when t=t, the concentration of A is (a-x)molL.

For a first order reaction, the rate of reaction,



where k is the rate constant.



integrating,





Here, c is the constant of integration.