final exam MC review file 3

final exam MC review file 3 - L1 SECTION L: KINETICS INDEX:...

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Unformatted text preview: L1 SECTION L: KINETICS INDEX: L001 LEVEL: (U) ANSWER: KEYWORDS: ALTERNATIVE FORMAT: (FR) The Arrhenius equation, k = A e- E / RT expresses the relationship between the reaction rate constant, k , and the energy of activation, E . How does increasing activation energy affect the probability that colliding molecules will react? The Arrhenius equation, k = A e- E / RT expresses the relationship between the reaction rate constant, k , and the energy of activation, E . The probability that colliding molecules will react (A) increases with increasing energy of activation. (B) depends only on the empirical constant, A . (C) increases with decreasing temperature. (D) decreases with increasing energy of activation. INDEX: L002 LEVEL: (U) ANSWER: KEYWORDS: ALTERNATIVE FORMAT: (FR) Omit responses. A change in temperature from 10 C to 20 C is found to double the rate of a given chemical reaction. How did this change affect the reacting molecules? (A) It doubled their average velocity. (B) It doubled their average energy. (C) It doubled the number of collisions per second. (D) It doubled the proportion of molecules possessing at least the minimum energy required for the reaction. (SA) = short answer; (FR) = free response; (TF) = true/false (U) = understanding; (A) = analysis; (G) = generalization Kinetics L2 INDEX: L003 LEVEL: (A) ANSWER: KEYWORDS: equilibrium ALTERNATIVE FORMAT: (FR) What experimental information is required to determine the rate equation for a chemical reaction? The rate equation for a chemical reaction is determined by (A) theoretical calculations. (B) measuring reaction rate as a function of concentration of reacting species. (C) determining the equilibrium constant for the reaction. (D) measuring reaction rates as a function of temperature. INDEX: L004 LEVEL: (A) ANSWER: KEYWORDS: ALTERNATIVE FORMAT: (FR) The rate of a reaction in the absence of a catalyst has been measured. The rate of the same reaction when catalyzed is 106 times faster. How does the activation energy for the catalyzed reaction compare to the activation energy for the uncatalyzed reaction? The rate of a reaction in the absence of a catalyst has been measured. The rate of the same reaction when catalyzed is 106 times faster. The activation energy for this reaction (A) is 6/ RT kcal/moIe. (B) can be calculated from the information above if the temperatures of the reactions are given. (C) is a concept that cannot be applied to chemical reactions. (D) is different in the two cases. INDEX: L005 LEVEL: (U) ANSWER: KEYWORDS: ALTERNATIVE FORMAT: (TF) The value of the rate constant of a reaction can generally be expected to . Use each response in a separate question. The value of the rate constant of a reaction can generally be expected to (A) be independent of temperature....
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final exam MC review file 3 - L1 SECTION L: KINETICS INDEX:...

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