Chemistry - Chemical Kinetics Question with Solution | TestHub

*If the Arrhenius prefactor $A$ is assumed to be unchanged by the catalyst*, equality of rate constants gives

$$A\exp \left(-\frac{42000}{R(500)}\right)=A\exp \left(-\frac{1000x}{R(450)}\right),\frac{42}{500}=\frac{x}{450},x=37.80\mathrm{kJ}\mathrm{mo}{\mathrm{l}}^{-1}.$$

*Editorial correction:* the source does not give the two Arrhenius prefactors. Without assuming they are equal, $x$ is not uniquely determined. The added assumption states the interpretation used by the supplied solution.