Reaction Rates The Arrhenius Equation

At 773K, kf = 5.5 x 10-4 sec-1 at 1000K the reaction is far faster (kf = 8.1 sec-1). Experiments show that over a wide range of temperatures we can write  

This explains the exponential term in Equation 4.41 the constant B is just the activation energy  

FIGURE 4.5 Relative enemies of cyclopropane, propene, and the transition state between the two. 

Equation 4.43 is called the Arrhenius equation, after Svante Arrhenius who proposed it in 1889. 

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The Frank-Kamenetskii equation uses a simple Arrhenius relationship for the reaction rate. The Arrhenius equation can be written as ... 

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