CHEM 360 Lecture Notes - Lecture 7: Polar Vortex, Ozone Depletion, Nitrogen Dioxide

• School: University of Illinois
• Department: Chemistry
• Course: CHEM 360
• Professor: M Shen

Document Summary

Conditions that cause the ozone hole to form. Low temperature and the rotation of the earth. Type 1: water, nitric acid, sulfuric acid. (a)conversion of nitric acid to nitrogen dioxide. Why does the antarctic ozone hole close in late spring and early summer. Cl + o3 clo + o2. Clo + o cl + o2. Cl + ch4 hcl + ch3. Hno3 + hv no2 + oh. Increased level of uv at the ground level. Amount of uvb reaching the ground level increases by a factor of 3 and not 6 in the antarctic region during the early part of spring. Since cfcs are heavier than air, how can cfcs reach the stratosphere to destroy ozone based on environmental transportation and transformation. Environmental transport of a substance depends on the transport properties of the medium into which the substance is released. Affected by its lifetime in the medium: fate. Environmental transformation is highly dependent on the medium.