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Are there any fluorocarbon refrigerant that cause no harm to stratospheric ozone?
No fluorocarbon refrigerants pose harm to the ozone layer. Only molecules with chlorine or bromine pose a hazard.
Which refrigerant will not damage ozone?
HCFC's are being used nowadays. These are the refrigerants that do not damage ozone.
Ozone freindly chemicals used by cfcs?
Nowadays we have alternatives for CFC's. These are called HCFC's.
What class of molecules has CFCs replace?
CFC's are ozone depleting substances. HCFC's are an alternative to CFC's.
How does hcfc destroy ozone layer?
HCFC do not destroy ozone. They are an alternative to CFC's.
What type of things can destroy the ozone layer?
The chlorine from chlorofluorocarbons (CFCs), (freons). The bromine from bromofluorocarbons (halons). Carbon tetrachloride and methylchloroform (found so far in increasing amounts at lower altitudes of the atmosphere).
What is the list of greenhouse gases?
They include carbon dioxide, methane, nitrous oxide, ozone, sulfur hexafluoride and CFC-12 and HCFC-22. The last 2 are chlorofluorocarbons (CFCs)
What are the characteristics of CFC and HCFC refrigerants and how do these refrigerants contribute to ozone depletion?
They were made and used because they are extremely stable, they had useful gas-to-liquid transition temperatures, and they were cheap (fluorine production is dirty, dangerous, and hence expensive). They contribute to ozone depletion because they are so stable they can only be brokne down in the intense radiation of the ozone layer, and their chlorine payload is released to do its dirty deed over and over.
How do you pronounce chlorofluorocarbons?
Pronounced "KLOR-oh-FLOR-oh-kar-bunz" (mostly fluoromethane refrigerants such as Freon, abbreviated CFC's; along with hydrochlorofluorocarbons, HCFC's, they are implicated in upper atmospheric ozone destruction)
When will be illegal to vent substitutes for CFC and HCFC refrigerants?
Since November 15, 1995
How did refrigerator manufacturers start to phase out the use of CFCs?
most manufacturers converted to foams using HCFC-141b as the blowing agent. HCFCs are an ozone depleting substance (ODS), but considered much less so than CFCs and so were singled out as the best transition blowing agent
What substance depletes ozone in the stratosphere?
CFC's and HCFC's
