SUPPL INSTR FOR CH 302 (GE 206E) - answerstoPPmodelsofreactions

# SUPPL INSTR FOR CH 302 (GE 206E) - answerstoPPmodelsofreactions

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Practice Problems: Models of Reactions (13.11-13.15) 1. Determine which of the following statements about catalysts are true. If the statement is false, explain why. (a) In an equilibrium process, a catalyst increases the rate of the forward reaction but leaves the rate of the reverse reaction unchanged. (b) A catalyst is not consumed in the course of a reaction. (c) The pathway for a reaction is the same in the presence of a catalyst as in its absence, but he rate constants are decreased in both the forward and reverse directions. (d) A catalyst must be carefully chosen to shift the equilibrium toward the products. 2. For the reversible, one-step reaction 2A B + C, the forward rate constant for the formation of B is 265 L·mol -1 ·min -1 and the rate constant for the reverse reaction is 392 L·mol -1 ·s -1 . The activation energy for the forward reaction is 39.7 kJ/mol and that of the reverse reaction is 25.4 kJ/mol. (a) What is the equilibrium constant for the reaction? (b) Is the reaction exothermic or endothermic? (c) What will be the

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## This note was uploaded on 09/28/2009 for the course GE 206E taught by Professor staff during the Spring '09 term at University of Texas.

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SUPPL INSTR FOR CH 302 (GE 206E) - answerstoPPmodelsofreactions

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