Problem: The rate constant of a reaction at 32°C is 0.055/s. If the frequency factor is 1.2 x 1013/s, what is the activation barrier?

FREE Expert Solution

We’re being asked to determine the activation barrier (activation energy, Ea) of a reaction given the rate constant and frequency factor.


We can use the two-point form of the Arrhenius Equation to calculate activation energy:


ln k=-EaR 1T + ln A


where: 

k = rate constant

Ea = activation energy (in J/mol)

R = gas constant (8.314 J/mol • K)

T = temperature (in K)

A = Arrhenius constant or frequency factor


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Problem Details

The rate constant of a reaction at 32°C is 0.055/s. If the frequency factor is 1.2 x 1013/s, what is the activation barrier?

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