What seven factors about fuels in order to choose the best fuel for a particular purpose.
Energy value, availability, storage, cost, toxicity, pollution (e.g. acid rain, green house effect) and ease of use.
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What does the combustion of a fuel release?
Heat (Thermal) energy.
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Why does complete combustion need a plentiful supply of oxygen?
so that the elements in the fuel react fully with oxygen.
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What does the complete combustion of a hydrocarbon make?
Only carbon dioxide and water.
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Word equation to show the complete combustion of a hydrocarbon.
hydrocarbon + oxygen → carbon dioxide + water
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Why does incomplete combustion take place?
ncomplete combustion occurs when the supply of air or oxygen is poor.
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Why does a blue bunsen burner flame release more energy than a yellow one?
Air hole's open,air's drawn into chimney where it mixes with natural gas.Complete combustion occurs.Very hot blue flame produced.Air hole's closed natural gas can only mix with air at mouth of chimney.Incomplete combustion occurs = Yellow flame.
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What does a yellow bunson burner flame produce a lot of?
Soot.
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What does the incomplete combustion of a hydrocarbon make?
Carbon monoxide, Carbon (soot) and water.
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What is the issue with carbon monoxide?
It's a poisonous gas.
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Word equation to show the complete incombustion of a hydrocarbon.
hydrocarbon + oxygen → carbon monoxide + carbon + water
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What two reasons are there for the number of fossil fuels being burnt increasing?
Increasing world population and growth of use in developing countries e.g. India and China.
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Balanced symbol equation for the complete combustion of methane, CH˅4
CH˅4 + 2O˅2 → CO˅2 + 2H˅2O
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Balanced symbol equation for the incomplete combustion of ethane, C˅2H˅6
C˅2H˅6 + 2O˅2 → CO + C + 3H˅2O
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Why is the yellow bunsen burner flame brighter than the blue one?
The yellow flame is brighter than the blue flame because the specks of carbon glow when heated.
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Incomplete combustion word equation - yellow flame bunsen burner
methane + oxygen → carbon monoxide + carbon + water
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complete combustion word equation - blue flame bunsen burner
methane + oxygen → carbon dioxide + water
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What is the disadvantage of incomplete combustion?
Produces carbon monoxide (CO) a poisonous gas.
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Other cards in this set
Card 2
Front
What does the combustion of a fuel release?
Back
Heat (Thermal) energy.
Card 3
Front
Why does complete combustion need a plentiful supply of oxygen?
Back
Card 4
Front
What does the complete combustion of a hydrocarbon make?
Back
Card 5
Front
Word equation to show the complete combustion of a hydrocarbon.
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