The reaction 2 N₂O₅ → 2 N₂O₄ + O₂ takes place at around room temperature in solvents such as CCl₄. The rate constant at 293 K is found to be 2.35 * 10^-4 s^-1, and at 303 K the rate constant is found to be 9.15 * 10^-4 s^-1. Calculate the frequency factor for the reaction.