CONFUSED with "INCOMPLETE combustion of alkanes"?

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FluffyCherry
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#1
Report Thread starter 7 years ago
#1
I'm not sure which one is right??

Alkane +oxygen -> Carbon monoxide + water

or

Alkane + oxygen -> Carbon monoxide +water +Carbon +carbon dioxide

the first one is mentioned in my textbook and the second one is mentioned in my revision guide (CGP).. so which one is correct??
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sangeet
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#2
Report 7 years ago
#2
(Original post by Anne james)
I'm not sure which one is right??

Alkane +oxygen -> Carbon monoxide + water

or

Alkane + oxygen -> Carbon monoxide +water +Carbon +carbon dioxide

the first one is mentioned in my textbook and the second one is mentioned in my revision guide (CGP).. so which one is correct??
I think what it means is:

Alkane + oxygen > carbon monoxide + water

Alkane + oxygen > carbon dioxide + water

Alkane + oxygen > carbon + water


These are all possible depending on the lack of oxygen present


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sangeet
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#3
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#3
(Original post by sangeet)
I think what it means is:

Alkane + oxygen > carbon monoxide + water

Alkane + oxygen > carbon dioxide + water

Alkane + oxygen > carbon + water


These are all possible depending on the lack of oxygen present


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So, complete combustion would be this:
Alkane + oxygen > carbon dioxide + water

Incomplete are these two:
Alkane + oxygen > carbon + water
Alkane + oxygen > carbon monoxide + water


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danconway
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#4
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#4
I generally say
alkane + oxygen -> water + carbon monoxide
and if necessary, state that solid carbon is formed.


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FluffyCherry
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#5
Report Thread starter 7 years ago
#5
(Original post by sangeet)
I think what it means is:

Alkane + oxygen > carbon monoxide + water

Alkane + oxygen > carbon dioxide + water

Alkane + oxygen > carbon + water


These are all possible depending on the lack of oxygen present


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in my textbook, it says:
You get carbon monoxide or carbon (soot) produced instead of carbon dioxide:
alkane + oxygen -> carbon monoxide + water (Incomplete combustion)

but in my revision guide, it says:
carbon dioxide and water are still produced but you can also get carbon and carbon monoxide

alkane + oxygen -> carbon + carbon monoxide + carbon dioxide + water (incomplete combustion)

It's just so confusing:confused:
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sangeet
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#6
Report 7 years ago
#6
Okay, I know you're confused but what I think it means is that in a different reaction but with the same reactants you get those products, because otherwise it doesn't make sense.

Trust your text book it's correct, believe me, not that your revision guide isn't, it's just the wording that's confused you
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sangeet
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#7
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#7
What's key is the idea of there being a lack of oxygen supply each time
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sangeet
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#8
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#8
Don't over complicate it for yourself x
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FluffyCherry
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#9
Report Thread starter 7 years ago
#9
(Original post by sangeet)
Don't over complicate it for yourself x
Thank you
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