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.
Tę umiejętność sprawdza 6 zadań wzorowanych na arkuszach IB z lat 2022–2026.
What does the pre-exponential (Arrhenius) factor, A, represent in the Arrhenius equation ? A. The frequency of collisions with the correct orientation B. The activation energy of the reaction C. The overall rate constant of the reaction D.…
Which reaction is expected to have the largest Arrhenius factor, A, at a given temperature? A. Cl2(g) + Br2(g) → 2 BrCl(g) B. Cl(g) + CH4(g) → HCl(g) + CH3(g) C. C2H4(g) + HBr(g) → C2H5Br(g) D. Cl(g) + Br(g) → BrCl(g)
Which statement is correct for the Arrhenius equation? A. As the temperature increases, the value of increases. B. At a given temperature, k increases as Ea increases. C. A is the minimum…
The graph shows plots of ln k against for two reactions, X and Y. Both lines are extended to the vertical axis. Considering the Arrhenius equation , which combination is correct for reactions X and Y?…
The rate of a different reaction at 45 °C is four times its rate at 25 °C. Calculate the activation energy, in kJ mol−1, for this reaction, using sections 1 and 2 of the data booklet.
In the Arrhenius equation, , which statement about the factor A is correct? A. It is the minimum energy needed for a successful collision. B. It is related to the frequency of collisions with the proper orientation. C. It is the…
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