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127293
Crude Oils and fuels
Descrição
GCSE Chemistry Mapa Mental sobre Crude Oils and fuels, criado por BubbleandSqueak em 09-06-2013.
Sem etiquetas
chemistry
chemistry
gcse
Mapa Mental por
BubbleandSqueak
, atualizado more than 1 year ago
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Criado por
BubbleandSqueak
aproximadamente 11 anos atrás
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Resumo de Recurso
Crude Oils and fuels
Most compounds are hydrocarbons
Only contain hydrogen and carbon
Covalent bonds
Most hydrocarbons in crude oil are alkanes
Alkane general formula: CnH2n + 2
Number of hydrogen atoms is double the no. of carbon + 2
Alkanes are saturated hydrocarbons=carbon atoms are joined by single bond
Fractional distillation
Hot at bottom and cool at top
Higher boiling points condense at bottom
Lower boiling points condense at top
Burning Petrol
Creates carbon monoxide
TOXIC!!
Non-renewable
Causes global dimming
Particulates (particles of carbon) reflect light back to space
Petrol includes: sulphur + oxygen = sulphur dioxide
This causes acid rain
Burning hydrogen
No pollutants
No extra CO2 added to air
Only releases water!
Biodiesel
Made from plants and animal oils
Carbon neutral
Same amount of carbon dioxide released in combustion as is absorbed in photoynthesis
Products = food for cattle and soap
Destroys animal habitats
Uses land that could have been used for food production
Nuclear power
Uses a fuel called uranium
Uranium put in rods that are placed in water
Nuclear reactions takes place when removed from water
Heats water to produce steam that turns turbine
Of coal, oil and gas, coal produces the most CO2
Renewable energy
Hydroelectricity
Pumped storage
Not a way of generating electricity - a way of STORING it!!
Wind energy
Solar energy
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