H2S, a toxic gas with rotten egg like smell, is used for the qualitative analysis. Other articles where Dichlorodifluoromethane is discussed: chlorofluorocarbon: …compounds, especially trichlorofluoromethane (CFC-11) and dichlorodifluoromethane (CFC-12), found use as aerosol-spray propellants, solvents, and foam-blowing agents. Freon–‐12 is used as a refrigerant in central home air conditioners. Free shipping on many items | Browse your favorite brands | affordable prices. There is now a direct replacement for R-12 on the market from Houston-based Pennzoil, called FR-12 and carrying the brand name FRIGC (pronounced frij-ik).Converting to FR-12 is a simple and relatively inexpensive process compared with the complicated conversions to the new R … 2) Stability: R12 is highly stable chlorofluorocarbon and it does not disintegrate even under the extreme operating conditions. The food and beverage, transportation, medical, and pharmaceutical industries, as well as commercial and residential buildings, use Freon™ refrigerant products to improve comfort and enhance quality of life. Mass = [ ] mg CL Firstly, there is no problem of the oil return back to compressor. There are very few places where you can actively buy R-12 … R-12 is a highly versatile refrigerant that is used for wide range of refrigeration and air conditioning applications though in many air conditioning applications it is now replaced by R22 refrigerant. The molecular weight of R12 is 120.9 and its boiling point is -21.6 degree F. Since R12 has the molecules of chlorine and fluorine, it is called as chlorofluorocarbon (CFC). If a current of 0.5 ampere flows through a metallic wire for 2 hours, then how many electrons would flow through the wire? The antiseptic property of iodoform is only due to the liberation of free iodine when it comes in contact with the skin. However, it was found that when a car emits R-12 Freon, it depletes the ozone layer. All Rights Reserved. CFC production, including Freon production, peaked in the mid-1980s [8,15]. Uses of Freon. Calculate the mass of urea (NH2CONH2) required in making 2.5 kg of 0.25 molal aqueous solution. Freon is not only used in air conditioning units, but it has also been used in upright and chest freezers. It was used as a refrigerant after it was discovered in 1928 and in aerosol spray but the manufacturing thereof was discontinued after forty five years after scientists discovered its potential danger to the ozone layer. There's some good news for owners of cars that use R-12 Freon refrigerant in their air-conditioning systems. 4) Miscibility with oil: Refrigerant R12 is miscible with the compressor oil under all the operating conditions. Thanks for the info. A solution of Ni(NO3)2 is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. Solid A is a very hard electrical insulator in solid as well as in molten state and melts at extremely high temperature. A 5% solution (by mass) of cane sugar in water has freezing point of 271 K. Calculate the freezing point of 5% glucose in water if freezing point of pure water is 273.15 K. The vapour pressure of pure liquids A and B are 450 and 700 mm Hg respectively, at 350 K. Find out the composition of the liquid mixture if total vapour pressure is 600 mm Hg. [ ] molecules CCl 2 F 2. But due its harmful effects, it was banned in the United States in 1973. R-12 is a highly versatile refrigerant that is used for wide range of refrigeration and air conditioning applications though in many air conditioning applications it is now replaced by R22 refrigerant. What type of defect can arise when a solid is heated? What mass of Ni is deposited at the cathode? Thus whenever there is leakage of R12 refrigerant it is advised to put all the flames off and keep the doors open so that it can escape to the open atmosphere. The formula of Freon-12 is one of the following: CF 4 , CF 3 Cl, CF 2 Cl 2 , CFCl 3 , or CCl 4 . (iii) It is used as a solvent in the manufacture of pharmaceutical products. Freon-12 is used as a refrigerant in central home air conditioners. This helps in using the compressor of low compression ratio that has higher efficiency. Refrigerant R12 is used in domestic refrigerators and freezers, liquid chillers, dehumidifiers, ice makers, water coolers, water fountains and transport refrigeration. It also describes the alternative replacements for R12. Iodoform was used earlier as an antiseptic, but now it has been replaced by other formulations-containing iodine-due to its objectionable smell. Give simple chemical tests to distinguish between the following pairs of compounds. The main applications of CFC’s have been use as refrigerant gases, propellants and blowing agents among others [15,21]. Refrigerant R12 is used in domestic refrigerators and freezers, liquid chillers, dehumidifiers, ice makers, water coolers, water fountains and transport refrigeration. R-410A is a type of HFC refrigerant that is widely used in newer AC units, replacing older HCFC coolants. On top of those, there are a large number of commercial and industrial appliances that use Freon in both food transportation and cold storage warehouses. Freon-12 (dichlorodifluoromethane, CF2Cl2) is commonly known as CFC. Due to this the heat transfer capacity of the condenser and evaporator is increased, which ultimately helps increase the efficiency of the refrigeration plant. A number of halogenated hydrocarbons and ethers are used as general inhalation anesthetics. Hence, its manufacture was banned in the United States and many other countries in 1994. R12 is being replaced by other refrigerants and some of the suggested replacements for R12 are: R-134a, R-401a, R-401b. The rate of effusion of Freon-12 to Freon-11 (molar mass = 137.4 g/mol) is 1.07:1. Refrigerant R12 or Freon 12 is said to be the most widely used of all the refrigerants being used for different applications.