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. The chemical responsible for the brown color of photochemical smog is nitrogen dioxide. Nitrogen dioxide is a fairly unstable molecule, that exists in the following equilibrium with colourless dinitrogen tetraoxide: 2 NO2 (g) <---> N₂O4 (9) AH = -57.20 kJ/mole a. A scientist takes an air sample from downtown Toronto during the winter at 0°C, and finds the following equilibrium concentrations: [N₂O4] = 1.8 × 10-v, [NO₂] = 5.59 x 10-D. What is the Keq for this reaction at 0°C? b. During the summer, the same scientist collects another air sample at 25°C and finds the following equilibrium concentrations: [N₂O4] = 4.0 × 10-Y, [NO₂] = 7.78 x 10-⁰. What is the Keq for this reaction at 25°C? C. What do your results from (a) and (b) suggest about when smog would be at its worst? What explains the difference in the equilibrium between summer and winter?

. The chemical responsible for the brown color of photochemical smog is nitrogen dioxide. Nitrogen dioxide is a fairly unstable molecule, that exists in the following equilibrium with colourless dinitrogen tetraoxide: 2 NO2 (g) <---> N₂O4 (9) AH = -57.20 kJ/mole a. A scientist takes an air sample from downtown Toronto during the winter at 0°C, and finds the following equilibrium concentrations: [N₂O4] = 1.8 × 10-v, [NO₂] = 5.59 x 10-D. What is the Keq for this reaction at 0°C? b. During the summer, the same scientist collects another air sample at 25°C and finds the following equilibrium concentrations: [N₂O4] = 4.0 × 10-Y, [NO₂] = 7.78 x 10-⁰. What is the Keq for this reaction at 25°C? C. What do your results from (a) and (b) suggest about when smog would be at its worst? What explains the difference in the equilibrium between summer and winter?

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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17. The chemical responsible for the brown color of photochemical smog is nitrogen dioxide. Nitrogen dioxide is a fairly unstable molecule, that exists in the following equilibrium with colourless dinitrogen tetraoxide: 2 NO₂ (g) <---> N₂O4 (g) AH = -57.20 kJ/mole a. A scientist takes an air sample from downtown Toronto during the winter at 0°C, and finds the following equilibrium concentrations: [N₂O4] = 1.8 × 10-V, [NO₂] = 5.59 × 10-⁰. What is the Keq for this reaction at 0°C? b. During the summer, the same scientist collects another air sample at 25°C and finds the following equilibrium concentrations: [N₂O4] = 4.0 × 10-Y, [NO₂] = 7.78 × 10-º. What is the Keq for this reaction at 25°C? C. What do your results from (a) and (b) suggest about when smog would be at its worst? What explains the difference in the equilibrium between summer and winter?
Transcribed Image Text:17. The chemical responsible for the brown color of photochemical smog is nitrogen dioxide. Nitrogen dioxide is a fairly unstable molecule, that exists in the following equilibrium with colourless dinitrogen tetraoxide: 2 NO₂ (g) <---> N₂O4 (g) AH = -57.20 kJ/mole a. A scientist takes an air sample from downtown Toronto during the winter at 0°C, and finds the following equilibrium concentrations: [N₂O4] = 1.8 × 10-V, [NO₂] = 5.59 × 10-⁰. What is the Keq for this reaction at 0°C? b. During the summer, the same scientist collects another air sample at 25°C and finds the following equilibrium concentrations: [N₂O4] = 4.0 × 10-Y, [NO₂] = 7.78 × 10-º. What is the Keq for this reaction at 25°C? C. What do your results from (a) and (b) suggest about when smog would be at its worst? What explains the difference in the equilibrium between summer and winter?
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