1. The following graph illustrates the distribution of kinetic energy of molecules at a certain temperature as well as the energy threshold that molecules must reach for a certain reaction to take place. Activation energy threshold Number of particles Kinetic energy If you add a catalyst, what happens in the graph? a) Region I decreases and region Il increases b) The activation energy moves to the right c) Region I increases and region II decreases d) Activation energy moves to the left 2. Which of the following substances has zero enthalpy of formation? a) water, H,O b) lead, Pb c) carbon dioxide, CO2 d) gold, Au 3. Which of the following does not affect the reaction rate: a) temperature b) catalyst c) product condition d) concentration of reagents

1. The following graph illustrates the distribution of kinetic energy of molecules at a certain temperature as well as the energy threshold that molecules must reach for a certain reaction to take place. Activation energy threshold Number of particles Kinetic energy If you add a catalyst, what happens in the graph? a) Region I decreases and region Il increases b) The activation energy moves to the right c) Region I increases and region II decreases d) Activation energy moves to the left 2. Which of the following substances has zero enthalpy of formation? a) water, H,O b) lead, Pb c) carbon dioxide, CO2 d) gold, Au 3. Which of the following does not affect the reaction rate: a) temperature b) catalyst c) product condition d) concentration of reagents

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter12: Chemical Kinetics

Section: Chapter Questions

Problem 9RQ

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