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What class of chemicals does artificial blood C8F17Br belong?
perfluorocarbons
What are two reasons perfluorocarbons are a bad alternative to chlorofluorocarbons?
its bad and im awesome
What are the 6 major GHGs targeted through the Kyoto Protocol?
They are carbon dioxide, methane, nitrous oxide, sulfur hexafluoride, hydrofluorocarbons, and perfluorocarbons.
What is the link between greenhouse effect and global warming?
Global warming is the direct result of the greenhouse effect. Without carbon dioxide in the atmosphere to act as a greenhouse gas, the world would be some 30 degrees colder than at present and life as we know it would be impossible. So the greenhouse effect is essential for human existence. It is the anthropogenic increase in greenhouse gases that is now causing concern. The present average global temperature is just about right for human comfort and civilisation. Greenhouse gas emissions are contributing to a rise in average global temperatures to a point that will have serious economic and social impacts on our lifestyle.
Why is it important to distinguish between anthropogenic greenhouse effect and natural greenhouse effect?
There is a natural greenhouse effect which is necessary to keep the earth warm enough for life. The earth has had a natural greenhouse effect for millions of years.Anthropogenic greenhouse effect means caused by human activity. When we seriously started burning fossil fuels about 150 years ago to warm our houses, produce electricity and power transport the temperature of the world has been slowly increasing. Most climate scientists believe it is almost too late to stop the world warming by 4 or 5 degrees Celsius, which will bring about catastrophic change to the planet.
What two groups of nations developed?
hydrofluorocarbons and perfluorocarbons
What class of chemicals does artificial blood C8F17Br belong?
perfluorocarbons
What are two reasons perfluorocarbons are a bad alternative to chlorofluorocarbons?
its bad and im awesome
What are flurocarbons?
fluorocarbons is a general name for a class widely industrial solvent which is also sometimes referred to as perfluorocarbons
What are the 6 major GHGs targeted through the Kyoto Protocol?
They are carbon dioxide, methane, nitrous oxide, sulfur hexafluoride, hydrofluorocarbons, and perfluorocarbons.
What are the types of greenhouses?
water vapour, carbon dioxide, methane, nitrous oxide, ozone, haloakanes, sulfur hexafluoride, hydrofluorocarbons, nitrogen trifluoride and perfluorocarbons
What are the types of greenhouse gases?
water vapour, carbon dioxide, methane, nitrous oxide, ozone, haloakanes, sulfur hexafluoride, hydrofluorocarbons, nitrogen trifluoride and perfluorocarbons
What causes global warminng?
Greenhouse gases emitted by human activities cause Global warming. There is an overwhelming consensus in the scientific community that this is the case. Six main greenhouse gases are carbon dioxide (CO2), methane (CH4) (which is 20 times as potent a greenhouse gas as carbon dioxide) and nitrous oxide (N2O), plus three fluorinated industrial gases: hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and sulphur hexafluoride (SF6). Water vapor is also considered a greenhouse gas.
What 6 sources of greenhouse gas in the US including the percentage?
H2O (Water vapor) ~5% --- accounts for about 72% of the greenhouse effect CO2 (Carbon Dioxide) ~0.038 % --- accounts for about 15% of the greenhouse effect CH4 (methane) ~0.00175 --- accounts for about 7% of the greenhouse O3 (Ozone) --- accounts for about 5% of the greenhouse effect The rest of the gases listed below make up pretty much all the rest of the greenhouse effect: N2O (nitrous oxide) ~0.00031 --- HFCs (hydrofluorocarbons) PFCs (perfluorocarbons) SF6 (sulphur hexafluoride)
What gases are the main greenhouse gases and how they are upsetting the Earth and also demonstrate using chemical reactions?
Many chemical compounds present in Earth's atmosphere behave as 'greenhouse gases'.The natural GHGs are:carbon dioxidemethanewater vapornitrous oxideThe artificial or man-made GHGs are:chlorofluorocarbons (CFCs)hydrofluorocarbons (HFCs)Perfluorocarbons (PFCs)sulfur hexafluoride (SF6).There is no chemical reaction which allows them to increase the retention of solar energy, just physical absorption and release of heat. This process allows the Earth's atmosphere to heat up.
Define a pure compound refrigerant and give two examples?
a refrigerant that does not change its pressure/temperature relationship when changing phases. CFC are pure compound refrigerants.
How does the Kyoto protocol Clean development mechanism work?
The Kyoto Protocol is an international agreement with the objective of reducing greenhouse gases that cause climate change. The Kyoto mechanisms are: * Stimulate sustainable development through technology transfer and investment * Help countries with Kyoto commitments to meet their targets by reducing emissions or removing carbon from the atmosphere in other countries in a cost-effective way * Encourage the private sector and developing countries to contribute to emission reduction efforts The protocol includes having most signatory countries lower the output of six greenhouse gases namely CO2, CH4, NO2, SF6, Hydrofluorocarbons (CFCs) and perfluorocarbons.
