Combustion Reactions

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Elizabeth Bowen 1J
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Combustion Reactions

Postby Elizabeth Bowen 1J » Thu Feb 06, 2020 9:31 pm

I know that we have to know how to write out combustion reactions on our own for the exam, so I was wondering if anyone could explain how to do that?

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Joined: Mon Nov 11, 2019 12:17 am

Re: Combustion Reactions

Postby 205291012 » Thu Feb 06, 2020 9:49 pm

A combustion reaction will have the form:

CnHm + (n + m/4) O2 --> nCO2 + m/2 H2O + Heat

so it will be a hydrocarbon + oxygen gas ---> carbon dioxide + water + heat

Samuel G Rivera - Discussion 4I
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Re: Combustion Reactions

Postby Samuel G Rivera - Discussion 4I » Fri Feb 07, 2020 5:21 am

I believe that when you are balancing a combustion equation you usually want to have a 1 for the coefficient of the hydrocarbon, or the thing you're burning, even if it means that the O2 has a coefficient that's not a whole number, such as 1/2.

Cooper Baddley 1F
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Re: Combustion Reactions

Postby Cooper Baddley 1F » Fri Feb 07, 2020 9:11 am

A combustion reaction always consist of the hydrocarbon plus O2 equaling CO2 plus H20 and in some cases nitrogen gas as well if it was present in the hydrocarbon

Amanda Mei 1B
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Re: Combustion Reactions

Postby Amanda Mei 1B » Fri Feb 07, 2020 10:30 am

A combustion reaction involves a hydrocarbon (compounds that contains only carbon and hydrogen) burning in (reacting with) diatomic oxygen to produce carbon dioxide and water. You would balance the O2 last, and you might need to use a fractional coefficient before multiplying all the coefficients by two.

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