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1. Arrhenius Equation

   Linked via "entropy of activation"

   Where $\kappa$ is the transmission coefficient (often assumed to be unity) and $k_B$ and $h$ are the Boltzmann constant and Planck constant, respectively.
   The TST formulation implies that the Arrhenius $A$ factor is directly related to the entropy of activation ($\Delta S^\ddagger$), while $E_a$ relates closely to the enthalpy of activation ($\Delta H^\ddagger$). The relationship between the emp…