Ch 3, supplemental problems: combustionIn each case, write a balanced equation for the combustion of the given compound. Assumecomplete combustion.1. heptane, C7H162. 2,2-dimethylbutane3. 1,1,3-trimethylcyclohexane4. 2-heptanol, C7H16O5. 1,6-hexanediol, C6H14O26.Answers1. C7H16(l) + 11 O2(g) →7 CO2(g) + 8 H2O (g)This equation shows the essential features. Ordinary complete combustion refers to thecomplete oxidation by O2, producing the major oxides. For compounds of C and H (and O)those are CO2and H2O. That is, the general reaction is<compound of CHO> + O2(g) →CO2(g) + H2O (g)You should think about the phases. You may or may not know the phase of the organicreactant, but I bet you “know” more of them than you think; give them a try. It’s reasonable toshow the phase of water as either gas or liquid. It is a gas under the conditions of thecombustion, but can be thought of as a liquid, back at “standard conditions”.
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