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3932799
Crude Oils and Fuels
Descrição
GCSE Chemistry Mapa Mental sobre Crude Oils and Fuels, criado por donnapumpkin em 02-11-2015.
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chemistry
gcse
c1 revision
chemistry
gcse
Mapa Mental por
donnapumpkin
, atualizado more than 1 year ago
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Criado por
donnapumpkin
aproximadamente 9 anos atrás
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Resumo de Recurso
Crude Oils and Fuels
Crude Oil
mixture of very large number of compounds that come from reserves in the ground
Mixture
two or more elements or compounds that are not chemically joined together
Hydrocarbon
molecule made of hydrogen and carbon atoms only
Saturated
When a hydrocarbon contains as many hydrogen atoms as possible (no double bonds)
Fuel
Compounds that are burnt to produce heat energy
Impurities in fuel
Fuels can have the following impurities in fuel: Sulfur, carbon and/or hydrogen
Fractional
Fractional distillation
A method of separating the different hydrocarbons in crude oil by using the fact that they different boiling points
hydrocarbons with high boiling points condense first
hydrocarbons with low boiling points condense higher up the column
Mixture of molecules that will be of similar sized and similar boiling point
Volatility
Tendency of a liquid to turn into a gas
Smaller hydrocarbons will be more volatile
Larger hydrocarbons will be less volatle
Viscosity
How easily a liquid flows
Smaller hydrocarbons will be less viscous
Larger hydrocarbons will be more viscous
Flammability
How easily a fuel burns
Smaller hydrocarbons will be more flammable
Larger hydrocarbons will be less flammable
Combustion
When a hydrocarbon fuel is oxidised and energy is released.
The carbon and hydrogen are oxidised -> carbon dioxide + water
Wet scrubbing
Removing sulfur dioxide after combustion from flue gases in powerstations chimney - reduces production of acid rain
Acid rain
When sulphur dioxide and nitrogen oxide dissolve in droplets of water in the air and react with oxygen and then fall as acid rain
Global warming
When carbon dioxide absorbs energy which is radiated from the earth's surface and causes a rise in global temperatures
Biofuels
Renewable fuels that are made from animals or plant products
Biodiesel
Biofuel made from oils extracted from plants
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