CFC The beginning of the CFC(chlorofluorocarbons) era started in 1928, when CFC' were invented by a Du Pont chemist. CFC' were best known as "freons" and became famous as a safe, nonflammable refrigerant. It's invention became a great triumph when Freon took the place of sulfur dioxide or ammonia which was used as the working liquid in refrigerators. It eventually became widely used in automobile air conditioners and nontoxic propellants in aerosol cans. It's insulating properties also was used
CFC Introduction: The organic compound Chlorofluorocarbon is known as CFC. This compound is made of chlorine fluorine and carbon only. CFC is in the group volatile organic compound. The CFC was first invented or made in 1928. The main purpose of CFC was to uses as refrigerants for refrigeration. Freon is the trade name of CFC .There are some main reasons behind the wide use of CFC. Non-toxic and flammability were the main reason. Around in 1960s the use of CFC increases among the developing nations
Chloroflourocarbons Chloroflourocarbons were discovered in the 1920's by Thomas Midgley, an organic chemist at General Motors Corporation. He was looking for inert, non- toxic, non-flammable compounds with low boiling points that could be used as refrigerants. He found what he was looking for in the form of two compounds: dichlorodifluoromethane (CFC-12) and trichloromonoflouromethane (CFC-11). In both compounds, different amounts of chlorine and fluorine are combined with methane, which is a combination
Global Warming and Chlorofluorocarbons (CFCs) Chlorofluorocarbons are non-toxic, non-flammable chemicals that are mainly used in the manufacturing of aerosols, blowing agents for foams and packing materials, as solvents, and as refrigerants. They are classified as Halocarbons, a class of compounds that contain carbon and halogen atoms, and are amongst a group of substances called “greenhouse gases”. They eat away at our ozone and raise the temperature of our planet significantly, causing detrimental
Chlorofluorocarbons [CFCs], commonly known as Freon, are a type of organic compounds that are made up of carbon, chlorine, and fluorine atoms. Their significant properties include low volatility of approximately 0℃, together with being tasteless, odourless, non-flammable, nontoxic, and chemically stable. They have supported the society for years through the form of a refrigerant, a solvent and a propellant. Moreover, they have contributed to the industrialization of nations, especially during the
biogeochemical cycles" as well as the effects of supersonic transport aircraft that release nitrogen oxide into the stratosphere.2 In 1974, Molina and Rowland found that human-made chlorofluorocarbons used for making foam, cleaning fluids, refrigerants, and repellents transform into ozone-depleting agents.3 Chlorofluorocarbons stay in the atmosphere for several decades due to their long tropospheric lifetimes. These compounds are carried into the stratosphere where they undergo hundreds of catalytic
Quaternium-52, Benzyl Salicylate, Limonene, Hexyl Cinnamal, Linalool. Hair spray contain many VOCs (volatile organic compounds) which cause serious damage to the ozone such as ozone depletion. These compounds, including methane as known as CFC (Chlorofluorocarbon), have been serious factors causing global warming. CFC was developed in the 1930s under the trade name Freon. “CFC was supposed to be wonder chemicals since they are nontoxic, nonflammable, don't react with any common chemicals, and thus were
refrigerants were toxic and volatile gases such as ammonia and methyl chloride. It is for this reason that when chemist Thomas Midgley Jr. developed what appeared to be a safe and inert substitute in the form of the family of chemicals known as chlorofluorocarbons in 1930, they were soon widely adopted as coolants for both refrigeration and industrial solvents1. It wasn’t until a few decades later, in 1974, that two scientists by the names of F. Sherwood Rowland and Mario Molina proposed that CFC emissions
and harms plant and animal life. For that reason the atmosphere and the ozone layer within it are crucial to a stable life on this planet. The ozone layer is in danger, however. It is facing depletion by a toxic man-made substance called chlorofluorocarbons (CFCs). Together the international community is working through treaties and conventions to stop this environmental problem. To understand the problem behind ozone depletion we first must understand what ozone is and how it works. Ozone
in existing technology. Incremental changes include substituting one or two steps in a production process or relationship changes between production steps. One example of incremental changes that was provided by the author was eliminating chlorofluorocarbons and saving energy by replacing a refrigeration process with a heath exchanger that can exploit waste cooling from another part of the process. There are three critical decision-making stages for incremental changes; identifying a pollution
and over global population take role and disturb the nature activity. They were increasing the level of greenhouse gases around the world. Ozone depletion is when the layer of ozone becoming thinner and thinner by some type of gases such as chlorofluorocarbon (CFCs). So that mean greenhouse effect and ozone depletion related to each other by be the main cause that make Global warming happen. Greenhouse gases have both advantage and disadvantage. Greenhouse gases are the several group types of gases
Man Made Global Destruction The Greenhouse effect and ozone depletion are two of the most prevalent environmental issues faced globally today. Greenhouse gases have the ability to absorb infrared radiation from the sun. Global warming refers to an increase in average global temperature due to natural and anthropogenic causes. Ozone depletion describes an observed decline of 4% ozone per decade in the total volume of the Earth’s stratosphere and seasonal ozone depletion events. Ozone levels within
“Global warming is controversial, of course, but the controversy is mainly over whether human activity is driving it (Michio Kaku).” For years, the suspect or suspects that cause global warming have been unknown. Two of the well-assumed and controversial possible defendants are balancing on a slightly unbalanced seesaw with scientific evidence that back up or refute their degree of involvement in the crisis. There is evidence that global warming is taking a toll on the earth and will continue to
destruction of ozone. Most of these chemicals are compounds called chlorofluorocarbons, or CFC’s. It is difficult to ban them outright because they have hundreds of industrial uses. CFC’s are widely used because they are non-toxic, non-flammable, and inexpensive. Recent environmental legislation on both the state and national levels has banned the use of some CFC’s, but the question of their disposal still remains.4 Chlorofluorocarbons do not destroy ozone directly. Compounds made from CFC’s photo-decay
In this time of age, things have been consuming a lot of electricity compared to the old electrical appliances. People have been innovating different types of electrical appliances to reduce the amount of electricity used by the household such as air conditioner, refrigerator, television, and other appliances. One way of saving electricity which have been introduced in the new era is the Bio Robot Refrigerator introduced by a student from Russia, Yuriy Dmitriev, which is one of the 25 finalists in
Problems In Today's Society There are many problems right now in the society. Some of these problems can be easily solved, or can be impossible to solve depending how bad it is. Many people think these problems should be solved by the governments, since they are in charge. But we can also solve these problems if we get together. Not all the problems, but some that can be solved. I think the three major problems in the society today are: unemployment, violence, and pollution. The first problem
(unnatural greenhouse gases) that are, or were, spewed into the air by man. The burning of fossil fuels now causes most of this: in our cars, trucks, power plants, etc. Until the latter part of the 20th century, it was the atmospheric release of chlorofluorocarbons (CFC's). These were a result of manufactured chlorine compounds, such as aerosol propellants and... ... middle of paper ... ...ent from U.S. Environmental Protection Agency: Jun. 1996 The Management Institute for Environment and Business
environment. There are federal regulations as well as state regulations on the amount of discharge that can be released. In such events as the Montreal Protocol, about 180 countries have come together in an attempt to eliminate the release of all chlorofluorocarbons, (CFC’s), in the near future. CFC’s are responsible for the depletion of the ozone layer. Finally, the EPA has the ability to levy taxes of 50,000 on companies for each ton of glop created. There are many pros and some cons t...
UV-B is damaging to all life forms on Earth. Without this layer of ozone in the stratosphere UV-B radiation would negatively affect humans, animals, plants, and sea life. Secondly, the ozone layer is being deteriorated by the accumulation of chlorofluorocarbons (CFCs) (CFC is a compound of chlorine, fluorine, and carbon. CFCs are used in propellants, foaming agents, aerosol sprays, solvents, and coolants in freezers and refrigerators), halons,... ... middle of paper ... ... twenty-seven years since
Reactions of chlorofluorocarbon molecules using these clouds as a reaction surface result in active forms of halogens from the chlorofluorocarbons being stored. The ozone hole forms as spring arrives along with warmer temperatures and the active halogens are released and act as catalysts to eliminate the ozone molecules. Ozone levels can drop to around 50% during this time. In the following months, the ozone hole is able to repair itself, but this is a slow process.i Chlorofluorocarbon m... ...