Combustion Problems from Destroyer

[wired202808]

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Guys,

are these necessary to know for gen Chem? I dont quite understand them and I dont remember chad covering them so I'm not sure if this is a tested concept. For reference, see Destroyer GC #166 (2011 edition)

 

[FROGGBUSTER]

http://forums.studentdoctor.net/showpost.php?p=11049340&postcount=2

 

[wired202808]

http://forums.studentdoctor.net/showpost.php?p=11049340&postcount=2

what do you mean hydrocarbon? and what chad lecture are you referring to? Like the number. I can review and see it! thanks.

 

[herkulease]

I have the 2010 edition but is this the one where he gives a table of values?

of the combustion problems destroyer has all he's doing making you understand how to balance and do the 2nd part of the problem. could be to find enthapy. another I remember was just stoichiometry one.

Combustion goes as such

hydrocarbon + O2 --> CO2 + H2O(l) + heat

these types can easily show up as its test you 2 to 3 things. knowing a reaction, balancing the reaction and whatever the 3rd part is.

 

[FROGGBUSTER]

a hydrocarbon is any molecule that is comprised of hydrogens and carbons (CxHy).

chad briefly mentioned combustion as an aside in G3.1. it's a very important reaction in chemistry and it's likely that it will show up on the real test.

 

[herkulease]

what do you mean hydrocarbon? and what chad lecture are you referring to? Like the number. I can review and see it! thanks.

hydrocarbons are compounds that are composed entirely of carbons and hydrogen.

examples are methane, propane, hexane. Crude Oil. You won't need to know what crude oil is but they could provide you the formula if they want.

 

[wired202808]

I have the 2010 edition but is this the one where he gives a table of values?

of the combustion problems destroyer has all he's doing making you understand how to balance and do the 2nd part of the problem. could be to find enthapy. another I remember was just stoichiometry one.

Combustion goes as such

hydrocarbon + O2 --> CO2 + H2O(l) + heat

these types can easily show up as its test you 2 to 3 things. knowing a reaction, balancing the reaction and whatever the 3rd part is.

The one I am talking about mentions the combustion of a propane gas and you need to find the rate of consumption of the oxygen? but he doesnt provide you with the formula for propane gas. Is it implied that you should know it or can you figure it out from the formula you gave?

 

[herkulease]

it is implied that you should know the formula for propane.

you should know it anyhow for ochem.

I'm very sure they expect you to at least know methane, ethane, propane all the way up to decane.

any complicated hydrocarbon like crude oil or such they'll give you the formula.

 

[wired202808]

it is implied that you should know the formula for propane.

you should know it anyhow for ochem.

I'm very sure they expect you to at least know methane, ethane, propane all the way up to decane.

any complicated hydrocarbon like crude oil or such they'll give you the formula.

oh i get it! so its just the regular propane formula + O2 --> CO2 + H2O(l) + heat
thats it? that makes it so much easier to understand! thanks a lot man!

 

[wired202808]

it is implied that you should know the formula for propane.

you should know it anyhow for ochem.

I'm very sure they expect you to at least know methane, ethane, propane all the way up to decane.

any complicated hydrocarbon like crude oil or such they'll give you the formula.

Do you remember where Chad mentions this? because I want to look at that video again to make sure I didnt miss anything else.

 

[herkulease]

oh i get it! so its just the regular propane formula + O2 --> CO2 + H2O(l) + heat
thats it? that makes it so much easier to understand! thanks a lot man!

Yup that is it.

nothing to it. just plug in the formula of whatever hydrocarbon they state or formula of whatever is given and off you go.