Past exam of the chemistry course of the year 1 of the natural sciences course of the University of Cambridge / 2025 / 5 / a / Solution

The Arrhenius equation isHere $E_a$ is the molar activation energy, $R$ the molar gas constant, $T$ the absolute temperature, and $A$ the pre-exponential factor, taken approximately constant over the measured range. For this bimolecular elementary reaction, $A$ and $k_1$ both have units $\mathrm{c}{\mathrm{m}}^3\mathrm{mo}{\mathrm{l}}^{-1}{\mathrm{s}}^{-1}$.