Fluoroalkanes, manufactured under the trade name freons, were found to have a wide range of useful physical properties these compounds also contain chlorine and are thus also known as chloro-fluorocarbons or cfcs in general, freons are nonflammable, odorless, noncorrosive, and nontoxic. Of low toxicity known as freons (carbon compounds containing fluorine and chlorine or bromine) in the early 1930s was an important stepby the middle of that decade american railways had installed small air-conditioning units on their trains, and by 1950 compact units had become practical for use in single. Why freon is used as refrigerant follow 3 the best known of these compounds is probably hfc-134a (r-134a), which in the united states has largely . Re: q16 - chlorofluorocarbons are the best possible by timmydoeslsat sun mar 04, 2012 5:27 pm as you have noticed, this is not a must be true question, so you knew going into the answer choices that we are hunting for a statement that has support. 12 ozone depletion • (iv) avoid purchasing and using pressurized aerosol cans which use cfcs, freons etc as propellants • (v) ban atmospheric nuclear .
These chemicals are now also known to be greenhouse gases with a global warming potential up to 11,000 times as strong as carbon dioxide by weight unfortunately, millions of products such as refrigerators, air conditioners, fire extinguishers and aerosol cans that contain cfcs are still in use around the world and are nearing the end of their . How can you use the word chlorofluorocarbons in a sentence the naming system for freons (chlorofluorocarbons or cfcs) was developed bydu pont countries agreed at the montreal conference . Aerosol propellants and refrigeration devices often make use of chlorofluorocarbons and related compounds more commonly known as their trade name, freon freon also acts and an organic solvent though it is a man-made compound. Chlorofluorocarbon (cfc) is an organic compound that contains carbon, chlorine, and fluorine, produced as a volatile derivative of methane and ethane a common subclass is the hydrochlorofluorocarbons (hcfcs), which contain hydrogen, as well.
Cfc (chlorofluorocarbons) essay - 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. Chlorofluorocarbons (cfcs) are a group of colorless, non combustible liquids, also known as freons cfcs have been used as refrigerants, propellants in aerosols, metal degreasers, i n fire. Freons is another name for a group of chemical compounds called chlorofluorocarbons (cfc) a common use of these compounds is as refrigerants freons are also used for making some varieties of .
For this reason, the freons are classified as chlorofluorocarbons also known as cfcs as well as hcfcs (hydrochlorofluorocarbons) along with related compounds freons are non-flammable, odorless, colorless, non-corrosive liquids or gases of a low toxicity which were first introduced in the form of a refrigerant in the era of the 1930s. Freon is a chlorofluorocarbon (cfc) that has been linked to ozone depletion, so it is quickly being phased out of use does this mean you should go out and buy a new hvac right away take a look at the history of freon and what is happening to its use, so that you understand how to determine the best course of action with your air conditioning units. Freon is a coolant/refrigerant used in a/c's or refrigerators to cool the air it is illegal in some states so check before use california mandates r-134a as a alternative. 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. B the acid-catalyzed reaction requires the use of water as a reactant, but the base-catalyzed reaction used sodium hydroxide c the acid-catalyzed reaction produces the molecular carboxylic acid, which has a strong odor, but the base-catalyzed reaction produces the carboxylate salt, which has no smell d.
Best answer: the primary chemicals that cause damage to the ozone are chlorofluorocarbons (cfcs or freons) and bromofluorocarbon (halons) decreasing or eliminating the use of these chemicals will help protect the ozone layer for the most part, this has already been done, and substitute chemicals have been found for use. The ternary compounds called chlorofluorocarbons, or freons, have proved to be very valuable as refrigerants and as cleaning agents for circuit boards unfortunately, in the atmosphere these compounds produce chlorine atoms that catalyze the decomposition of the ozone that protects the earth from ultraviolet radiation. Cfcs, or chlorofluorocarbons, also referred to as freons, consist of various combinations of chlorine, fluorine and carbon atoms cfcs have been used as propellants, refrigerants, foaming agents . Chlorofluorocarbons - cfc's (cfc), any of several organic compounds composed of carbon, fluorine, chlorine, and hydrogen cfcs are manufactured under the trade name freon (qv). The best known of these compounds is probably hfc-134a (r-134a), which in the united states has largely replaced cfc-12 (r-12) in automobile air conditioners in 1928, thomas midgley, jr aided by charles franklin kettering invented a miracle compound called freon.
Cfc's 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. Freons™, also called fluorocarbons or chlorofluorocarbons, have been a source of concern to environmentalists since 1974, when frank s rowland and mario j molina suggested that these substances might be contributing to the destruction of earth’s ozone layer. Download citation on researchgate | on jan 1, 2006, international atomic energy agency and others published use of chlorofluorocarbons in hydrology:a guidebook }. Not all freons contain either chlorine or bromine, so your question has no answer chlorine or bromine is required in the molecule f or freons to be an ozone depleter chlorofluorocarbons destroy the ozone layer by what.
Chlorofluorocarbon they are often known as freons their widespread use in aerosols and to phase out the use of cfcs the best-known example of this . American chemical society: chemistry for life had shown that chlorofluorocarbons—cfcs—could destroy ozone, such compounds were known to be volatile and .