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16 Cards in this Set
- Front
- Back
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chain isomerism
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isomers have carbon skeleton arranged in a different way
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positional isomers
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same carbon skeleton but functional group occurs in a different position.
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functional group isomers
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different functional groups
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fraction definition
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a mixture of compounds having a narrow range of boiling points
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negative temperature gradient
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it is cooler at the top than at the bottom
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cracking involves...
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breaking bonds in large alkanes to give smaller molecules e.g. alkenes and branched- chain alkanes
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thermal cracking . conditions. types of products. uses
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high pressure and temp. alkenes , short chain alkanes and hydrogen. to make polymers , plastics
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catalytic cracking . conditions. types of products. uses
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slight pressure, high temp , zeolite catalyst . branched chain alkanes, cycloalkanes and aromatic hydrocarbons. used as motor fuels.
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cracking used to ...
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convert low value fractions into high value products . short chain alkanes a of higher value than long chain.
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SO2 is produced when fuels which contain...
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sulphur containing compounds are burnt
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most motor fuel is purified before it is used to...
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remove impurities to give low - sulphur fuel
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CaO (solid ) plus SO2 (gas gives) ...
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CaSO3
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CaCO3 plus heat gives
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CaO and CO2 - greenhouse gas alert
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carbon is a environmental problem because ...
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it causes global warming
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petrol engines produce the following products
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CO C, NITROGEN OXIDES NOX, NO NO2, unburned hydrocarbons
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harmless products formed from catalytic converter
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N2, CO2, H2O
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