Domanda del libro di testo
From the data in Table 18.1, calculate the partial pressures of carbon dioxide and argon when the total atmospheric pressure is 1.05 bar.
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Ch.18 - Chemistry of the Environment
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
Capitolo 18, Problema 10b
(b) Explain why the stratosphere, which is about 35 km thick, has a smaller total mass than the troposphere, which is about 12 km thick.
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insert step 1> The troposphere is the lowest layer of Earth's atmosphere and contains approximately 75% of the atmosphere's total mass. This is because it is denser and contains more air molecules per unit volume due to the gravitational pull being stronger closer to Earth's surface.
insert step 2> The stratosphere, located above the troposphere, extends from about 12 km to 47 km above Earth's surface. Although it is thicker than the troposphere, it contains less mass.
insert step 3> The reason for the smaller total mass of the stratosphere is that air density decreases with altitude. As you move higher in the atmosphere, the air becomes less dense, meaning there are fewer air molecules in a given volume.
insert step 4> The stratosphere's lower density is due to the decrease in atmospheric pressure with altitude. As you ascend, the weight of the air above decreases, leading to a reduction in pressure and density.
insert step 5> Therefore, even though the stratosphere is thicker in terms of vertical distance, its lower density results in a smaller total mass compared to the denser, albeit thinner, troposphere.
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Atmospheric Layers
The atmosphere is divided into layers based on temperature gradients, with the troposphere being the lowest layer where weather occurs, extending up to about 12 km. Above it lies the stratosphere, which extends from 12 km to about 50 km. Each layer has distinct characteristics, including temperature and composition, affecting their mass and density.
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08:52
Acid-Base Extraction
Density and Pressure
Density is defined as mass per unit volume, and it varies with altitude in the atmosphere. The troposphere contains a higher concentration of air molecules due to greater pressure at lower altitudes, resulting in higher density. In contrast, the stratosphere, being higher and less dense, has fewer air molecules, contributing to its smaller total mass despite its greater thickness.
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01:56Density Concepts
Temperature Variation
Temperature plays a crucial role in atmospheric structure. In the troposphere, temperature decreases with altitude, leading to more air being compressed and thus a higher mass. Conversely, in the stratosphere, temperature increases with altitude due to the absorption of ultraviolet radiation by ozone, which reduces the density of air and results in a lower total mass despite its greater height.
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03:48Temperature vs Heat
Pratica correlata
Domanda del libro di testo
Air pollution in the Mexico City metropolitan area is among the worst in the world. The concentration of ozone in Mexico City has been measured at 441 ppb (0.441 ppm). Mexico City sits at an altitude of 7400 feet, which means its atmospheric pressure is only 0.67 atm. (a) Calculate the partial pressure of ozone at 441 ppb if the atmospheric pressure is 0.67 atm.
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Domanda del libro di testo
(a) What is the primary basis for the division of the atmosphere into different regions?
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Domanda del libro di testo
(a) How are the boundaries between the regions of the atmosphere determined?
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Domanda del libro di testo
Air pollution in the Mexico City metropolitan area is among the worst in the world. The concentration of ozone in Mexico City has been measured at 441 ppb (0.441 ppm). Mexico City sits at an altitude of 7400 feet, which means its atmospheric pressure is only 0.67 atm. (b) How many ozone molecules are in 1.0 L of air in Mexico City? Assume T = 25 °C.
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