k = A·exp(−Ea/RT); ln(k₂/k₁) = (Ea/R)·(T₂−T₁)/(T₁T₂)

Arrhenius rate law (Arrhenius 1889): the temperature-dependence of a first-order rate constant k(T) = A·exp(−E_a/RT) where A is the pre-exponential (frequency) factor and E_a the activation energy. Geochemical uses: mineral-dissolution…