# Kinetics Practice Test Multiple Choice

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 ESSAY 1. ANS: Many small pieces of kindling have a greater amount of surface area than a few large logs. Fire is a surface reaction. One feature of surface reactions is that the amount of reaction that occurs is proportional to the amount of surface area. This feature is useful for starting the fire. Once the fire is burning well, the larger logs can be used to increase the heat output. PTS: 1 DIF: II REF: d371a9ba-f97e-11de-9c72-001185f0d2ea OBJ: 2 2. ANS: As the substrate nears the active site of the enzyme, the potential energy increases. The formation of the activated complex occurs at the peak of the energy curve. When the products form and leave the active site, the energy decreases. PTS: 1 DIF: II REF: d3740c17-f97e-11de-9c72-001185f0d2ea OBJ: 3 PROBLEM 1. ANS: Solution: PTS: 1 DIF: II REF: d3743327-f97e-11de-9c72-001185f0d2ea OBJ: 4 2. ANS: PTS: 1 DIF: II REF: d3766e74-f97e-11de-9c72-001185f0d2ea OBJ: 4 3. ANS: The first step is the slower step, and is considered the rate-determining step. Rate law from the rate-determining step is R=k[NO2][F2]. PTS: 1 DIF: II REF: d378d0d1-f97e-11de-9c72-001185f0d2ea OBJ: 5 4. ANS: rate law: R = k[NH3]; specific rate constant k: When the concentration changes by a factor of 2, the rate remains also doubles, so the rate law is R = k[NH3]. PTS: 1 DIF: III REF: d378f7e1-f97e-11de-9c72-001185f0d2ea OBJ: 5 5. ANS: rate law: R = k[N2O5]2; specific rate constant k: When the concentration changes by a factor of 2, the rate changes by a factor of 4, so the rate law is R = k[N2O5]2. PTS: 1 DIF: III REF: d37b332e-f97e-11de-9c72-001185f0d2ea OBJ: 5 COMPLETION 1. ANS: reaction mechanism PTS: 1 TOP: Chapter 17 Test B 2. ANS: catalyst PTS: 1 TOP: Chapter 17 Test B 3. ANS: enough energy, a favorable orientation a favorable orientation, enough energy PTS: 1 STA: TEKS C.9C TOP: Chapter 17 Test B 4. ANS: rate-determining step PTS: 1 TOP: Chapter 17 Test B 5. ANS: endo PTS: 1 TOP: Chapter 17 Test B 6. ANS: homogeneous PTS: 1 TOP: Chapter 17 Test B 7. ANS: order PTS: 1 TOP: Chapter 17 Test B 8. ANS: specific rate constant, k PTS: 1 TOP: Chapter 17 Test B 9. ANS: higher PTS: 1 TOP: Chapter 17 Test B MATCHING 1. ANS: A PTS: 1 TOP: Chapter 17 Test B 2. ANS: B PTS: 1 TOP: Chapter 17 Test B 3. ANS: A PTS: 1 TOP: Chapter 17 Test B 4. ANS: B PTS: 1 TOP: Chapter 17 Test B 5. ANS: D PTS: 1 TOP: Chapter 17 Test B Directory: site -> handlersDownload 272.25 Kb.Share with your friends:
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