Ch3HW - Ch 3, supplemental problems: combustion In each...

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Ch 3, supplemental problems: combustion In each case, write a balanced equation for the combustion of the given compound. Assume complete combustion. 1. heptane, C 7 H 16 2. 2,2-dimethylbutane 3. 1,1,3-trimethylcyclohexane 4. 2-heptanol, C 7 H 16 O 5. 1,6-hexanediol, C 6 H 14 O 2 6. Answers 1. C 7 H 16 (l) + 11 O 2 (g) 7 CO 2 (g) + 8 H 2 O (g) This equation shows the essential features. Ordinary complete combustion refers to the complete oxidation by O 2 , producing the major oxides. For compounds of C and H (and O) those are CO 2 and H 2 O. That is, the general reaction is <compound of CHO> + O 2 (g) CO 2 (g) + H 2 O (g) You should think about the phases. You may or may not know the phase of the organic reactant, but I bet you “know” more of them than you think; give them a try. It’s reasonable to show the phase of water as either gas or liquid. It is a gas under the conditions of the combustion, but can be thought of as a liquid, back at “standard conditions”. As to balancing, there is a basic approach which generally works well for any CHO
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This note was uploaded on 03/14/2011 for the course CHEM 237 taught by Professor Andersen during the Spring '08 term at University of Washington.

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