Writing Balanced Equations for Combustion Reactions Write the balanced equation for the reaction that occurs when methanol, CH3OH(/), is burned in air. Write the balanced equation for the reaction that occurs when ethanol, C2H50H (/), burns in air.
Solution 2PE Step 1 Combustion reactions are rapid reactions that produce a flame. Most of the combustion reactions we observe involve O from air as a2eactant.illustrate a general class of reactions involving the burning or combustion of hydrocarbon compounds (compounds that contain only carbon and hydrogen, such as CH and C H ). 4 2 6 When hydrocarbons are combusted, they react with O to form CO and H O. (Whe2there is an 2 2 insufficient quantity of O present, 2rbon monoxide, CO, will be produced. Even more severe restriction of O will2ause the production of fine particles of carbon that we call soot. Complete combustion produces CO . Unless spec2ically stated to the contrary, we will take combustion to mean complete combustion.) The number of molecules of O required in the reaction a2 the number of molecules of CO and H O form2 depend o2the composition of the hydrocarbon. For example, the combustion of propane, C H , a gas used for cooking and home heating, is 3 8 described by the following equation: C3H8(g)+5O2(g)3CO2(g)+4H2O(l).