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Arrehenius equation and its application of class-12 (Chemistry)

 Most important question of class 12th students

(Question)-What is Arrehenius equation? Explain and Write it's application?

(Answer)- Rate constant increases on increasing temperature. Hence rate of Reaction also increases on increasing temperature. According to Arrehenius,Rate constant of a chemical reaction, increases exponentially on increasing temperatures.
             

On taking log of Arrehenius equation
In K=In A-Ea/RT
Or log k=log A-Ea/2.303RT
Or log k=logA-Ea/2.303R×1/T

A straight line is obtained on plotting a graph between log K and 1/T Whose slope is found to be -Ea/2.303k

Application
(1) Activation energy may be determine by this equation.
(2) Rate constant may be determined by change in temperature
(3) Relation in Activation energy and rate constant may be found


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