Ozone :: essays papers

OzoneOzone is an of import molecule in maintaining the homeostasis in theenvironment. Ozone, the molecule O3, makes a social class in the stratosphere,situated 10 to 15 kilometers from the earths surface. The dioxidemolecule, O2 and Oxygen atom O, collide with to each one other result in theformation of Ozone, O3. In this reaction, the molecule O3 contains an bare(a)of skill. Once the molecule is formed, it is not stable enough to lastlong. The energy-rich O3 molecules discards the pleonastic energy by collidingwith another atom or molecule and transferring the energy in the form ofheat. In the results of the decomposition of ozone into O2 and O in theozone layer, solar radiation syndrome is absorbed. This process of the chemical bondbreaking causing the tightness of a photon by a molecule is calledphotodissociation. Radiation with sufficient intensity, is opened ofseparating the O3 molecule, resulting in photodissociation. The cyclicprocess formation and decomposition of ozone provides a harbour againstultraviolet radiation that enter the earths atmosphere. If it were not forthe chemical reaction of radiation and ozone in the stratosphere, thesehigh-energy photons would penetrate the earths surface. The ozone layerabsorbers about 99% of the malign radiation which makes it possible foranimals and plants to live on the planet.In 1974, F. Sherwood Rowland and Mario Molina of the University ofCalifornia proposed that atomic number 17 from chlorofluorocarbons (CFCs) coulddeplete the ozone layer. Beginning in 1957 to 1985, the British AntarcticSurvey had mensural the average ozone submersion over Halley Bay inAntarctica. Up until 1974, the ozone concentration remained stable. Yet after(prenominal) 1974, the team observed a decline of the ozone layer to levels lessthan 10%. From this study the awareness over the danger of the golf hole andultraviolet radiation and the destruction being done to the earth. Scientists believe the expanding ozone hole, which is revolve about overAntarctica was caused by Chloroflurocarbons. CFCs are released into theenvironment through such sources as spray cans , air conditioners,factories, refrigerants and cleaning products. CFCs are dangerous to theatmosphere because after they are released into the environment, thesunlight breaks down the compound. The chlorine molecules react with theozone molecules by permanently breaking down the molecule, thus diminishingthe ozone layer. This rise poses a major(ip) threat environment. In 1985, inVienna and in 1987 in Montreal, a Protocol was signed proposing the gradualtermination of use of CFCs over the decades. A dramatic reduction in theuse of CFCs was agreed on. Regulations to limit the yield of