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# Write Arrhenius equation. What is the ${E_a}$ in the equation called?

Last updated date: 06th Sep 2024
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Hint: The Arrhenius equation, derived and proved by Swedish scientist Svante August Arrhenius, is an empirical equation relating the temperature dependence of reaction rates. It helps us to obtain reaction rate at a particular temperature. According to the Arrhenius model, each reaction needs a threshold energy for the reaction to begin, known as the activation energy.

Formulas used: $k = A{e^{\dfrac{{ - {E_a}}}{{RT}}}}$
Where $k$ is the rate constant, $A$ is a constant known as the pre-exponential factor, ${E_a}$ is the activation energy for the reaction (in the same units as $RT$), $R$ is the universal gas constant and $T$ is the absolute temperature (in kelvin)

$k = A{e^{\dfrac{{ - {E_a}}}{{RT}}}}$
Where $k$ is the rate constant, $A$ is a constant known as the pre-exponential factor, ${E_a}$ is the activation energy for the reaction (in the same units as $RT$), $R$ is the universal gas constant and $T$ is the absolute temperature (in kelvin)
As we can see from the equation, the term ${E_a}$ denotes the activation energy of the reaction, which is the minimum energy that must be possessed by the reactants at a specific temperature for the reaction to occur.