Science cfc ace

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This is a powerpoint on Chloro-Fluoro-Carbons. Hope you enjoy

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Science cfc ace

  1. 1. By: Brian K Chen<br />
  2. 2. Content<br />Intro<br />Atoms and elements <br />The natural way<br />What is the ozone layer<br />The common perception<br />Scientific truth<br />The result<br />How are CFCs gotten rid of<br />What’s been done<br /><ul><li>What should we do
  3. 3. Interesting facts
  4. 4. Sources</li></li></ul><li>Intro<br />CFC is short for ChloroFluoro Carbon.<br />It is a man mad substance and is harmful to the environment, more specifically, the ozone layer.<br />It is emitted through many daily appliances, at first, people didn’t even know that it was bad.<br />Nowadays, steps are being made to correct things.<br />
  5. 5. Atoms and elements <br />Oxygen<br /> -1 oxygen atom is not very important<br /> -2 oxygen atoms=the oxygen in the air we breathe<br /> -3 oxygen atoms=an ozone molecule<br />Flourine<br />Carbon<br />Chlorine<br />
  6. 6. The natural way<br />Normally, the process of producing ozone is very balanced<br />One ozone molecule breaks into two oxygen atoms and one oxygen atom. <br />The two oxygen atoms joins with one oxygen atom form another ozone molecule<br />The one oxygen atom joins with two oxygen atoms to form another ozone molecule.<br />The process is very balanced.<br />
  7. 7. What is the ozone layer<br />The ozone layer is part of the stratosphere and is made mostly by one element, oxygen.<br />Ozone itself is a substance. One ozone molecule is made of 3 oxygen molecules.<br />The Ozone layer is part of the stratosphere which is one section of the atmosphere<br />Without the ozone layer, we would be exposed to ultra-violet radiation from the sun.<br />This would cause widespread skin cancer and other problems<br />
  8. 8. What is the common perception <br />
  9. 9.
  10. 10. Where do CFCs come from<br />coolants such as refrigerators and air conditioners.<br />Aerosols like antiseptic sprays <br />
  11. 11. The scientific truth <br />Chloroflouro carbons can be written as CF3Cl<br />The C is carbon-1 atom<br />F is Flourine-3 atom<br />Cl is Chlorine-1 atoms<br />After ultraviolet radiation from the sun, one chlorine atom breaks off we have CF3+Cl<br />The single Chlorine atom is the most dangerous.<br />
  12. 12. The scientific truth<br />The single chlorine atom will, after it has broken off, combine with ozone molecule and break it into 1 oxygen atom and one oxygen molecule with two atoms.<br />Then it will combine with one of the oxygen atoms.<br />
  13. 13. The scientific truth<br />After wards, the combination will combine with an oxygen atom and break down into another oxygen molecule.<br />The following word equations explains this<br />
  14. 14. The result <br />The process was balanced but now the CFCs are causing ozone molecules to be destroyed faster than they are being created<br />That is real bad<br />
  15. 15. Why is the CFC so dangerous<br />The problem is how long it takes for a CFC molecule to leave the stratosphere<br />Normal physical means cannot get rid of it<br />On average, one CFC molecule can destroy 100,000 Ozone molecules in its life time<br />There are only a few ways of getting rid of it<br />
  16. 16. How is the CFC gotten rid of<br />When the chlorine atom collides with other molecules such as hydrocarbons, it forms hydrogen chloride which can leave the atmosphere dissolved in water.<br />Other way is to let the atom slowly drift out<br />
  17. 17. What has been done<br />There is the Montreal protocol<br /> -It links countries together<br /> -In this agreement, they all set aims together to cut producing of CFCs<br /> -Singapore is included<br /> -It has been changed many times to improve it<br />
  18. 18. What should we do?????<br />We should check if the goods we buy such as refrigerators don’t have CFC<br />Do projects like this to raise public awareness<br />
  19. 19. Interesting facts<br />In some urban areas although the ozone layer is thinner, there is actually less Ultra-violet radiation reaching the ground<br />This is because of pollution<br />The carbon dioxide and smog in the air actually helps to block the ultra-violet radiation!!!<br />
  20. 20. Sources<br />Wikipedia<br />Collins advanced science chemistry<br />http://answers.ask.com/Science/Nature/where_do_cfc_come_from<br />
  21. 21. Thanks for watching!!!<br />

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