• The Arrhenius equation uses the temperature dependence of the rate constant to determine the activation energy.

• A graph of 1/T against ln k is a linear plot with gradient – Ea / R and intercept, lnA.

• The frequency factor (or pre-exponential factor) (A) takes into account the frequency of collisions with proper orientations.

• Analysing graphical representation of the Arrhenius equation in its linear form

ln 𝑘 = −𝐸𝑎/RT + ln 𝐴.

• Using the Arrhenius equation 𝑘 = 𝐴 𝑒 −𝐸𝑎/RT

• Describing the relationships between temperature and rate constant; frequency factor and complexity of molecules colliding.

• Determining and evaluating values of activation energy and frequency factors from data.

• Use energy level diagrams to illustrate multi-step reactions showing the RDS in the diagram.

• Consider various data sources in using the linear expression ln 𝑘 = −𝐸𝑎/RT + ln 𝐴.