- Lab 2 Con two reactions with the same activation energy can have er should ref

Question

- Lab 2 Con two reactions with the same activation energy can have er should refer to the Arrhenius equation. s pts each ith thc same tempcratu activatlon cncrgy a Explain how, at the same temperature, different rate constants. Your answer Two reactions tvvo diffcrent rate cor rate conctanticaual tto thc h to-the . Povver otnegati ve activat ion iv ded OTregntive activatio the rateconstant can vary rntt of the reaction 8 pts each Indicate the rate-dectermining step in the following reaction coordinate diagram, and indicatc whether the reaction is endothermic or exothermic. Indicate what species could be described as "intermediates" and which as "transition states." cA trancition.statc s thc ratt-determin reaction is endothcrti 6 pts each Reaction A has an equilibrium constant of 4.26*10 at 250 K. Find the equilibrium constant of Reaction B at the same temperature. 4Alli, (g) + P4 (g) 4 H,P (g) + 4 Al (g) All, (g) + ¼ P. (g) H,P (g) + Al (g) i, n ver cc(B)

Explanation / Answer

Part 4

4 AlH3 + P4 = 4H3P + 4Al

K = 4.26 x 10^26

Multiply by 1/4 into the first reaction

AlH3 + (1/4) P4 = H3P + Al

New equilibrium constant

K' = K1/4

= (4.26 x 10^26)1/4

= 4.543 x 10^6

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