Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Why the most densely packed (110) surface is least active and the open (111) plane exhibits the
highest sticking coefficient?
![**Dissociative Nitrogen Adsorption on Fe Single Crystal Surfaces**
This graph illustrates the dissociative adsorption of nitrogen (\(N_2\)) on iron (Fe) single crystal surfaces at a temperature of 693 K. The y-axis represents an unspecified variable, likely related to the degree of adsorption, while the x-axis denotes nitrogen exposure in Langmuir (\([L]\)), ranging from 0 to \(9 \times 10^7\).
**Curves:**
- **Fe(111):** Exhibits the steepest initial increase, indicating rapid adsorption at lower nitrogen exposures, before leveling off.
- **Fe(100):** Also shows significant adsorption but with a more gradual slope compared to Fe(111).
- **Fe(110):** Displays the slowest adsorption rate, with a modest increase over the range of exposure levels.
**Visual Representations of Fe Crystal Surfaces:**
- **Fe(110):** Represented as a simple grid of circles in light blue.
- **Fe(100):** Illustrated with fewer, evenly spaced circles.
- **Fe(111):** Highlights a denser arrangement, with alternating rows of white and blue circles.
These depictions of atomic arrangements illustrate the different crystallographic surface structures that influence the adsorption properties detailed in the graph.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F707fd7c9-f05f-427f-bd8e-6f6e6eb1c9eb%2F18252f66-ddb4-4b66-9d7b-016ec9d9ff62%2Fa6vs1hh_processed.png&w=3840&q=75)
Transcribed Image Text:**Dissociative Nitrogen Adsorption on Fe Single Crystal Surfaces**
This graph illustrates the dissociative adsorption of nitrogen (\(N_2\)) on iron (Fe) single crystal surfaces at a temperature of 693 K. The y-axis represents an unspecified variable, likely related to the degree of adsorption, while the x-axis denotes nitrogen exposure in Langmuir (\([L]\)), ranging from 0 to \(9 \times 10^7\).
**Curves:**
- **Fe(111):** Exhibits the steepest initial increase, indicating rapid adsorption at lower nitrogen exposures, before leveling off.
- **Fe(100):** Also shows significant adsorption but with a more gradual slope compared to Fe(111).
- **Fe(110):** Displays the slowest adsorption rate, with a modest increase over the range of exposure levels.
**Visual Representations of Fe Crystal Surfaces:**
- **Fe(110):** Represented as a simple grid of circles in light blue.
- **Fe(100):** Illustrated with fewer, evenly spaced circles.
- **Fe(111):** Highlights a denser arrangement, with alternating rows of white and blue circles.
These depictions of atomic arrangements illustrate the different crystallographic surface structures that influence the adsorption properties detailed in the graph.
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