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Identify the nucleophilic and electrophilic sites in the reactants of the following reaction. Identify the nucleophilic and electrophilic sites in the reactants of the following reaction.

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blured image_TB4454_00 6.10 Desc...

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What is the effect of a catalyst on a reaction?


A) It increases the rate.
B) It decreases the entropy.
C) It changes the equilibrium.
D) It makes the products more stable.

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Draw an energy diagram for an endothermic reaction with two steps.

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Of following reactions, which one(s) would you expect to have a negative ∆S? Of following reactions, which one(s) would you expect to have a negative ∆S? A) I B) II C) III D) IV E) I and II Of following reactions, which one(s) would you expect to have a negative ∆S? A) I B) II C) III D) IV E) I and II


A) I
B) II
C) III
D) IV
E) I and II

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Which of the following energy diagrams shows the reaction with the smallest energy of activation?


A) Which of the following energy diagrams shows the reaction with the smallest energy of activation? A) B) C) D)
B) Which of the following energy diagrams shows the reaction with the smallest energy of activation? A) B) C) D)
C) Which of the following energy diagrams shows the reaction with the smallest energy of activation? A) B) C) D)
D) Which of the following energy diagrams shows the reaction with the smallest energy of activation? A) B) C) D)

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Based on the following energy diagram, is the reaction exothermic or endothermic? Based on the following energy diagram, is the reaction exothermic or endothermic?

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Predict the sign of ∆G for an exothermic reaction with an increase in entropy.


A) positive
B) negative
C) no change
D) cannot predict without additional information

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Identify the nucleophilic site(s) in the following molecule. Identify the nucleophilic site(s) in the following molecule.

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Based on the following energy diagram, is the reaction exothermic or endothermic? Based on the following energy diagram, is the reaction exothermic or endothermic?

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Does a reaction with a positive ∆G favor reactants or products?

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Draw arrows for each step of the following reaction. Draw arrows for each step of the following reaction.

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Identify the arrow in the following equation. Identify the arrow in the following equation. A) B) C) D)


A) Identify the arrow in the following equation. A) B) C) D)
B) Identify the arrow in the following equation. A) B) C) D)
C) Identify the arrow in the following equation. A) B) C) D)
D) Identify the arrow in the following equation. A) B) C) D)

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Which of the following indicates a reaction with a positive ∆G?


A) endergonic, spontaneous
B) endergonic, not spontaneous
C) exergonic, spontaneous
D) exergonic, not spontaneous

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What is wrong with the following mechanism? What is wrong with the following mechanism? A) There is no leaving group, so there should be no arrows. B) The arrow should be removing a proton from the H<sub>2</sub>O group. C) An arrow is also needed to indicate the loss of the leaving group. D) The arrow is backwards.


A) There is no leaving group, so there should be no arrows.
B) The arrow should be removing a proton from the H2O group.
C) An arrow is also needed to indicate the loss of the leaving group.
D) The arrow is backwards.

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Draw an energy diagram for a concerted exothermic reaction.

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Predict the sign of ∆S for the following reaction. SHAPE \* MERGEFORMAT Predict the sign of ∆S for the following reaction. SHAPE \* MERGEFORMAT A) positive B) negative C) no change Predict the sign of ∆S for the following reaction. SHAPE \* MERGEFORMAT A) positive B) negative C) no change


A) positive
B) negative
C) no change

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