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14 Cards in this Set
- Front
- Back
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crude oil is mainly a mixture of. ...
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hydrocarbons
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fuel oil is used as a fuel in...
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power station furnaces
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methane CH4 is a gas that canbe used as a fuel durong complete combustion it burns in oxygen to produce carbon dioxide and water write the balanced equation for the complete combustion of mathane
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CH4 + 2O2 --> CO2 +H2O
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methane, mass bunt - 16, heat energy released - 896
octane, mass burnt - 114, heat energy released - 5472 when 1g of methane is burnt 56kj of heat energy is produced calculate the heat energy produced when 1g of octane is burnt |
48
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state 2 factors that make a fuel good
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easy to ignite
low boiling point easy to store carbon neutral low viscosity |
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what was the relative amounts lf carbon dioxide and oxygen in the earths early atmosphere
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large amount ofcarvon dioxide and small amount lf oxygen
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the concentration of carbin dioxide in the earths atmospheres depends on the balance between the process that removes carbon dioxide from the atmosphere and those that release carbon dioxide into the atmosphere
explain how carbon dioxide is removed fromthe atmosphere |
plants photosynthesise taking in carbon dioxide hence releasing oxygen
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explain how carbon dioxide is released into the atmosphere
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complete combustion of burning fossil fuels or wood or plastic etc
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describe a test to show there is carbon dioxide
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limewater turns milky / cloudy
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marble amd limestone areboth forms of calcium carbonate name another one
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chalk
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when calcium carbonate is heated strongly it undergoes thermal decomposition CaCO3 --> CaO + CO2
2.50g of calcium carbinate was heated strongly 1.40g of solid remained after heating calculate the mass of carbin dioxide during this reactuon6 |
1.1g
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calcium oxide reacts with water to form calcium hydroxide
write a balanced equation for this reaction |
CaO + H2O --> Ca + (OH)2
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it is possible that not all of the calcium carbonate decomposed when it was heated suggest what could be done to confirm that the decomposition was complete
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heat the remaining solid again or for longer mass after heating stays the same and doesnt turn limewater milky
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calcium carbinate is used to treat waste gases produced in a coal fired power stations
explain why calcium carbonate is used in this way |
neaturalises the waste gases which reduces / prevents acid rain
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