Why Are Small Quantities Of Chlorofluorocarbons So Harmful To The...

à 27 avril

Other chemicals that damage the ozone layer include methyl bromide (used as a pesticide) Finally, volcanic eruptions are a small contributor to ozone damage, accounting for one to five percent. These aerosols accelerate damaging chemical reactions, which cause chlorine to destroy ozone.B. They are very light molecules that rapidly rise into the upper atmosphere and block the radiation that forms ozone. C. They are greenhouse gases that raise the temperature above the dissociation temperature of ozone. D. The radiation in the stratosphere dissociates C-Cl bonds producing Cl...Hydrofluorocarbons were created to protect the ozone layer, but their stable nature makes them an HFCs were designed specifically to replace ozone-destroying compounds previously used in air conditioners In a strange twist, the least environmentally harmful option may well be carbon dioxide.Why is ozone depletion greatest at the poles? The severe depletion of the Antarctic ozone layer known as the "ozone hole" occurs because of Chlorofluorocarbons have been banned since 1996 because they destroy the ozone layer. Chlorofluorocarbons (CFCs) are a group of manufactured...They are harmful to the ozone layer in the earth's atmosphere owing to the release of chlorine atoms on exposure to ultraviolet radiation. Beneficial change may be defined as the change that cause benefit to the human and other population. The harmful change has negative effect on the organisms.

Solved: Why Are Chlorofluorocarbons So Damaging To... | Chegg.com

The vast hole in the ozone layer above Antarctica appears to be healing, scientists say, putting the world on track to The study, published in Science, states that the phase-out of chlorofluorocarbon (CFC) chemicals means that the "But when we looked at September we saw it was getting smaller.The ozone layer helps to protect life from harmful ultraviolet radiation. Over the past 30 years humans have made progress in stopping damage to the ozone layer by curbing the use of Aerosol from cans sometimes contains ozone-depleting substances called chlorofluorocarbons, or CFCs.The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains a high concentration of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.Chlorofluorocarbons and Ozone Depletion. Grades: 9-12 Subject areas: Atmospheric chemistry, chemical reactions, and history. Additionally, stratospheric ozone concentrations fluctuate naturally by geography and season. Why are chlorofluorocarbons so damaging because of this?

Hydrofluorocarbons saved the ozone layer, so why are we banning...

Ozone in the atmosphere The ozone layer Ultraviolet protection by ozone. one to another, explains why the highest content of ozone occur in the layer between 15 and 50 km, Prediction by Chapman Chlorofluorocarbons (CFCs)  CFCs is the abbreviated form of ChloroFluoroCarbons, a collective...CFCs or chlorofluorocarbons are organic compounds that found large scale application in refrigerants few decades ago. However, it was found out that CFCs react with the The ozone protects us from the harmful ultraviolet radiations of sun and hence ozone layer destruction is extremely harmful to us.Another ozone hole (with smaller size) was discovered over the Arctic. At the same time, many small ozone holes are found in Ozone Hole Healing. Scientists have proposed the solution to the ozone holes problem "Chlorofluorocarbons (CFCs) are heavier than air, so how do scientists suppose...The ozone layer is a natural layer of gas in the upper atmosphere that protects humans and other living things from harmful ultraviolet (UV) radiation The ozone loss over the Arctic is however usually less severe than over the Antarctic and is more variable from year to year due to the climatic and...The ozone layer is one of the layers in the earth's atmosphere The UVB radiation that is screened out by the ozone layer can cause health issues when exposure is too high, which is why the ozone layer The ozone layer has been damaged by substances known as chlorofluorocarbons (CFCs)...

When spray cans were first introduced, the propellent used to shoot the material from the can tended to be dangerous and harmful, such as ammonia.

CFCs, or Chlorofluorocarbons, were invented to rid the cans of the dangerous propellents. They are non-toxic and non-flammable and seemed to be the perfect solution.

It turns out, however, that with all the CFCs being introduced into the atmosphere from all the hair spray, cooking spray, lubricating spray, and all the other kinds of spray can products, it had a harmful effect on the ozone layer of the atmosphere.

There isn't a lot of ozone in the atmosphere, so what is there is important to help protect the surface of the Earth from excess ultraviolet light from the Sun. And it turns out that it reacts to chlorine, which means in effect that Chlorine destroys ozone.

The chlorine in CFCs gets released when it reacts with ultraviolet light, which then reacts with ozone and thereby reduces the protection protection we get from ultraviolet light, which allows more CFC to release its chlorine and on the cycle goes. One free chlorine atom, free because UV radiation has hit the CFC molecule, will interact with multiple ozone molecules. Thus, the damage it can do is perhaps far more than you would expect.

http://www.theozonehole.com/cfc.htm