Combustion

Moderators: Chem_Mod, Chem_Admin

Julia Lee
Posts: 80
Joined: Fri Sep 28, 2018 12:29 am

Combustion

Postby Julia Lee » Wed Oct 03, 2018 10:16 am

Hey, do any of you guys know what the problem is telling us if it says that there is a combustion of whatever molecule? If we were writing a chemical equation for that would it just be whatever molecule + O2 ?

Joonsoo Kim 4L
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

Re: Combustion

Postby Joonsoo Kim 4L » Wed Oct 03, 2018 10:25 am

I'm pretty sure that the combustion of a hydrocarbon follows this pattern:

Hydrocarbon + (x)O2 -> (y)CO2 + (z)H2O

Where (x), (y), and (z) are stoichiometric coefficients you assign to balance the equation. An analogy from class that helped me to remember this was oxygen metabolism: when you consume food (usually comprised of hydrocarbons) and breathe oxygen, you exhale CO2 and water.

Olivia Young 1A
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Combustion

Postby Olivia Young 1A » Wed Oct 03, 2018 11:07 am

If a problem is telling you that there is a combustion of a certain molecule, then it is essentially saying that the designated organic molecule combines with oxygen(O2) to form carbon dioxide(CO2) and water(H2O). Since the combustion of molecules occurs in air, there is an excess of O2 molecules, so the appropriate hydrocarbon is always the limiting reagent. The combustion of organic molecules is just like oxidative metabolism in which they all release energy. Therefore, a chemical equation involving combustion would go as follows:

Organic compound(gas) + O2(gas) --> CO2(gas) + H2O(gas)

904914909
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: Combustion

Postby 904914909 » Wed Oct 03, 2018 4:42 pm

Combustion is just the combination of an organic molecule with O2 and it includes the products CO2 and H2O

Emily Ng_4C
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

Re: Combustion

Postby Emily Ng_4C » Wed Oct 03, 2018 6:27 pm

Combustion requires the presence of O2 and will always form H2O and CO2.

Duby3L
Posts: 72
Joined: Fri Sep 28, 2018 12:26 am

Re: Combustion

Postby Duby3L » Wed Oct 03, 2018 6:52 pm

A combustion reaction will always yield the products of CO2 and H2O.

Austin Clack
Posts: 29
Joined: Fri Sep 28, 2018 12:17 am

Re: Combustion

Postby Austin Clack » Thu Oct 04, 2018 7:14 pm

Yes you are right. In a chemical equation oxygen is necessary for combustion. This will always yield water vapor and CO2, like others have said. However, the additional product of energy is present as well.


Return to “Balancing Chemical Reactions”

Who is online

Users browsing this forum: No registered users and 1 guest