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.
Ch.18 - Chemistry of the Environment

18장, 문제 10a
(a) How are the boundaries between the regions of the atmosphere determined?
검증된 단계별 안내1
Understand that the atmosphere is divided into layers based on temperature gradients and composition.
Identify the main layers of the atmosphere: the troposphere, stratosphere, mesosphere, and thermosphere.
Recognize that the boundaries between these layers, known as 'pauses' (e.g., tropopause, stratopause), are determined by changes in temperature trends.
Note that in the troposphere, temperature decreases with altitude, while in the stratosphere, temperature increases with altitude due to ozone absorption of UV radiation.
Realize that the mesosphere sees a decrease in temperature with altitude, and the thermosphere experiences an increase in temperature with altitude due to solar radiation absorption.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
1m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Atmospheric Layers
The atmosphere is divided into distinct layers based on temperature gradients and composition. These layers include the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer has unique characteristics, such as temperature changes and the presence of specific gases, which help define the boundaries between them.
추천 영상:
가이드 코스
Acid-Base Extraction
Temperature Inversion
Temperature inversion occurs when the temperature increases with altitude, contrary to the normal decrease. This phenomenon can create distinct boundaries between atmospheric layers, as it affects air stability and the mixing of air masses. Inversions are crucial for understanding weather patterns and pollution dispersion.
추천 영상:
가이드 코스
Temperature vs Heat
Pressure and Density Gradients
The atmosphere's structure is also influenced by pressure and density gradients, which decrease with altitude. These gradients help define the boundaries of atmospheric layers, as different layers exhibit varying densities and pressures. Understanding these gradients is essential for comprehending how air moves and interacts within the atmosphere.
추천 영상:
가이드 코스
Density Concepts
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(a) What is the primary basis for the division of the atmosphere into different regions?
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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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교과서 질문
(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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