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### Consider the mixture of propane, $\mathrm{C}_{3} … 08:44 University of New Mexico Need more help? Fill out this quick form to get professional live tutoring. Get live tutoring Problem 75 Consider the mixture of ethanol,$\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH},$and$\mathrm{O}_{2}$shown in the accompanying diagram. (a) Write a balanced equation for the combustion reaction that occurs between ethanol and oxygen. (b) Which reactant is the limiting reactant? (c) How many molecules of$\mathrm{CO}_{2}, \mathrm{H}_{2} \mathrm{O}, \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH},$and$\mathrm{O}_{2}$will be present if the reaction goes to completion? Answer a) See explanation for result. b)$\mathrm{CH} 3 \mathrm{CH} 2 \mathrm{OH}\$ is the limiting reactant.
c) there are four molecules of carbon dioxide, six molecules of water, zero molecule of ethanol and one molecule of oxygen are present at the end of the reaction.

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## Video Transcript

No. The combustion reaction between eternal on oxygen is sure to balance the carbon atom. Multiply the carbon dioxide molecules on the product side by two. Along with that, multiply water molecules on the product side. But three no next parties multiply extra oxygen molecule on the reactor inside by three to balance out the oxygen atom, which gives us the final balanced equation for auction. Being from the diagram given in the caution, it is clear that there are two molecules off ethanol on dhe. Seven molecules off oxygen from the balance chemical equation. It can be concluded that one molecule off it on all requires three molecule of oxygen to give product hens in the reaction mixture. The only reactant left is one molecule of oxygen. The ethanol is the limiting regent for Option C. Consider the falling represented reaction, but we're here. We know for one molecule of ethanol. Three more legal off oxygen is required, are used on two molecules of carbon dioxide along with three molecules Off water will be found. No, we calculate the number off reacted on the product for the species as Xun. Hence, there are four molecules of carbon dioxide, six molecule off water, zero molecules off button, All remaining. Finally, one molecule of oxygen is present at the end off reaction.