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The CO₂ molecule has strong absorption lines in the neighborhood of λ = 10 µm. Assuming that the cross sections of CO₂ molecules with N₂ and O₂ molecules are σ(CO₂, N₂) = 1.20 nm² and σ(CO₂, O₂) = 0.95 nm², estimate the collision- broadened linewidth for CO₂ in the atmosphere. (Note: Since the concentration of CO₂ is very small compared to N₂ and O₂ in air, you may assume that only N₂-CO₂ and O₂-CO2 collisions contribute to the linewidth.) Compare this to the Doppler width.

The CO₂ molecule has strong absorption lines in the neighborhood of λ = 10 µm. Assuming that the cross sections of CO₂ molecules with N₂ and O₂ molecules are σ(CO₂, N₂) = 1.20 nm² and σ(CO₂, O₂) = 0.95 nm², estimate the collision- broadened linewidth for CO₂ in the atmosphere. (Note: Since the concentration of CO₂ is very small compared to N₂ and O₂ in air, you may assume that only N₂-CO₂ and O₂-CO2 collisions contribute to the linewidth.) Compare this to the Doppler width.

Chemistry
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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The CO₂ molecule has strong absorption lines in the neighborhood of λ = 10 µm. Assuming that the cross sections of CO₂ molecules with N₂ and O₂ molecules are σ(CO₂, N₂) = 1.20 nm² and σ(CO₂, O₂) = 0.95 nm², estimate the collision- broadened linewidth for CO₂ in the atmosphere. (Note: Since the concentration of CO₂ is very small compared to N₂ and O₂ in air, you may assume that only N₂-CO₂ and O₂-CO2 collisions contribute to the linewidth.) Compare this to the Doppler width.
Transcribed Image Text:The CO₂ molecule has strong absorption lines in the neighborhood of λ = 10 µm. Assuming that the cross sections of CO₂ molecules with N₂ and O₂ molecules are σ(CO₂, N₂) = 1.20 nm² and σ(CO₂, O₂) = 0.95 nm², estimate the collision- broadened linewidth for CO₂ in the atmosphere. (Note: Since the concentration of CO₂ is very small compared to N₂ and O₂ in air, you may assume that only N₂-CO₂ and O₂-CO2 collisions contribute to the linewidth.) Compare this to the Doppler width.
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