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 ethylene glycol, C2H4(OH)2, burns in air.
Solution1PE Step 1 Combustion reactions are rapid reactions that produce a flame. Most of the combustion reactions we observe involve O from air as a r2ctant.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. (When t2re is an 2 2 insufficient quantity of O present, carbon monoxide, CO, will be produced. Even more severe 2 restriction of O will cause the production of fine particles of carbon that we call soot. Complete 2 combustion produces CO . Unless speci2cally stated to the contrary, we w ill take c ombustion to mean c omplete combustion.) The number of molecules of O required in the reaction and 2e number of molecules of CO and H O formed2epend on 2e composition of the hydrocarbon. For example, the combustion of propane, C H , a gas used for co3in8and home heating, is described by the following equation: C3H8(g)+5O2(g)3CO2(g)+4H2O(l).