Classify the impacts of ozone in the stratosphere and troposphere using the info
ID: 296477 • Letter: C
Question
Classify the impacts of ozone in the stratosphere and troposphere using the information in the introduction.
Drag the appropriate items to their respective bins.
KHW CH 13 Ozone and its Depletion 18 of 26 Constants Periodic Tabl Apart from the oxygen we breathe, which is made up of diatomic oxygen (O2), the common allotrope of oxygen is triatomic oxygen, or ozone (O3) It is the highly reactive form of oxygen that has both beneficial and harmful effects. Ozone is a relatively unstable form of molecular oxygen containing three oxygen atoms (03) and its production occurs in two layers of the atmosphere-the stratosphere and the troposphere Ozone is produced in the stratosphere (upper atmosphere above troposphere) when diatomic oxygen combines with atomic oxygen, which is made by splitting O2 with ultraviolet (UV) radiation 02 (g) + 0(g) 03 (g) Because ozone absorbs UV radiation, it functions as a protective shield for the troposphere (lower atmosphere) against the harmful effects of UV radiation and makes life possible. Upon absorbing UV radiation, ozone molecules convert back to oxygen molecules and oxygen atoms O3 (g) energy (UV radiation) -02(g) O(g) With depletion of stratospheric ozone, harmful UV radiation reaches Earth's surface. Increased exposure to this radiation leads to diseases of the skin, eye, and immune system Ozone is considered a pollutant when it is close to Earth's surface in the troposphere. It is a powerful oxidizing agent that causes severe irritation in the eyes and respiratory system, it hardens rubber, and it damages crops by interfering with photosynthesis. Life on Earth will be difficult if the ozone level increases in the troposphere Ozone is also formed by chemical reactions between nitrogen oxides (NO) and volatile organic compounds (VOCs) in the presence of sunlight. Emissions from industries and motor vehicles, gasoline vapors, and chemicals such as chlorofluorocarbons (CFCs) are some of the major sources of NO and VOCs that cause photochemical smog The CFCs used as aerosols and refrigerants are inert near Earth's surface and can persist in the environment. They diffuse into the stratosphere, where they can destroy thousands of ozone molecules that make up the protective ozone layer. Because of continuous exposure to CFCs, the ozone layer is depleting Therefore, CFCs have been banned in the United States and many other countries, and have been replaced by effective substitutes such as hydrofluorocarbons (HFCs)Explanation / Answer
Part A:
In stratosphere :
In Troposphere :
Part B :
Part C :
First step : UV light breaks a C-Cl bond of the CFC.
Second step : The Chlorine atom reacts with ozone to form a ClO radical.
Third step : An oxygen atom reacts with the ClO radical to produce more Cl.
Last step : The series of reactions continues.