CHM 111 Lecture Notes - Lecture 5: Atomic Number, Nanometre, Gilbert N. Lewis
21 Apr 2016
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Document Summary
In the troposphere, ozone is a pollutant that forms in the presence of sunlight from other pollutants in our atmosphere. All of the ozone up high is formed naturally. Unlike ground-level ozone, stratospheric ozone plays a vital role in protecting us from damaging solar radiation. Precautionary principle: principle stresses the wisdom of acting, even in the absence of complete scientific data, before the adverse effects on human health or the environment. It is possible for humans to detect concentrations as low as 10 parts per billion (ppb), that is, 10 molecules out of 1 billion. Difference in molecular structure translates to significant differences in chemical properties. Ozone far more chemically reactive than o2. Ozone forms naturally and as a result of human activities. Ozone process requires energy: energy + 3 o2 2o3. The stratosphere is where ozone does most of its filtering of some types of ultraviolet light from the sun. 90% of ozone is found in stratosphere.
