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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: polky91 on January 11, 2010, 11:23:53 AM

Title: Help me pleace
Post by: polky91 on January 11, 2010, 11:23:53 AM

please help I have a big problem. Who can tell me the combustion reaction that occurs between nitrous oxide and acetylene?

Could you please calculate the difference in enthalpy of this reaction?

Title: Re: Help me pleace
Post by: cpncoop on January 11, 2010, 11:45:46 AM

Acetylene is CHCH (triple bonded), Nitrous oxide is N2O. The reaction would be:

CHCH + 5 N2O   ---->   2 CO2 + H2O + 5 N2

People burn things with nitrous oxide because it actually has a higher percentage of oxygen present than natural air.  The oxidation reaction is the same though... oxygen adds to the fuel (in this case aceylene) to form CO2 and H2O.

This is a simplified picture, because in true combustion, there are alot of side products.

Title: Re: Help me pleace
Post by: savy2020 on January 11, 2010, 05:17:48 PM

Entalpy of the reaction isn't hard to find if you had bond-energies or heats of formation etc. What more info is given to find enthalpy of reaction?