Activation energy and Arrhenius factor from data

Determine the activation energy from the gradient of an ln k against 1/T plot or from two rate constants at two temperatures, and find the Arrhenius factor A from the intercept, interpreting A as the frequency of correctly oriented collisions.

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What does the pre-exponential (Arrhenius) factor, A, represent in the Arrhenius equation $k = Ae^{-E_a/RT}$ ? A. The fraction of collisions with the correct orientation and sufficient frequency B. The activation energy of the reaction C. The overall rate…

Which reaction is expected to have the largest Arrhenius factor, $A$ , at a given temperature? A. $\ce{Cl2(g) + Br2(g) -> 2BrCl(g)}$ B. $\ce{Cl(g) + CH4(g) -> HCl(g) + CH3(g)}$ C. $\ce{C2H4(g) + HBr(g) -> C2H5Br(g)}$ D. $\ce{Cl(g) + Br(g) -> BrCl(g)}$

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