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How Does Carbon Compound In Alcohol Affect The Combustion Of Alcohol

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Vick Hung
Draft 1

How does carbon compound in a alcohol affect the energy release from the combustion of the alcohol

Introduction

In Organic Chemistry unit of our Chemistry class, our teacher taught us about the different types of alcohols, and the different characteristics of them. On my own time with personal interest, I learned more about alcohol, and noticed potential in these substance. The presence of alcohol could be found in many places, from food and ingredient in the kitchen, to bio fuel in technologies.
A most commonly used alcohol is ethanol. ethanol has been in our lives for a long time. It is used in cleaning, and is also introduced to industrial usage. Ethanol is also blend into gasoline to reduce air pollution in combustion
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2070
358
1494
463 - 2778
3216

total enthalpy of reaction 4731
- 5994
-1263

propan-1-ol C-C C-H C-O O=O H-O product of reaction H-O C=O bond enthalpy 346 414 358 498 463 463 804
# of bonds 2 7 1 4.5 1 8 6 total bond enthalpy 692
2898
358
2241
463 - 3704
4824

total enthalpy of reaction 6652
- 8528
-1876

butan-1-ol C-C C-H C-O O=O H-O product of reaction H-O C=O bond enthalpy 346 414 358 498 463 463 804
# of bonds 3 9 1 6 1 10 8 total bond enthalpy 1038
3726
358
2988
463 - 4630
6432

total enthalpy of reaction 8573
- 11062
-2489

pentan-1-ol C-C C-H C-O O=O H-O product of reaction H-O C=O bond enthalpy 346 414 358 498 463 463 804
# of bonds 4 11 1 7.5 1 12 10 total bond enthalpy 1384
4554
358
3735
463 - 5556
8040

total enthalpy of reaction 10494
- 13596
-3102

Hexan-1-ol C-C C-H C-O O=O H-O product of reaction H-O C=O bond enthalpy 346 414 358 498 463 463 804
# of bonds 5 13 1 9 1 14 12 total bond enthalpy 1730
5382
358
4482
463 - 6482
9648

total enthalpy of reaction 12415
- 16130
-4285

Compare data from bond enthalpy calculation to Data from PT Data

meth eth prop but pen hex
Bond enthalpy calculation -650 -1263 -1876 -2489 -3102
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although both the lines showed a gradual increase, all the calculated values are lower then those of the Physical and Thermochemical Data except for hexan-1-ol. but

Conclusion overall, the investigation showed a positive correlation between the increase of carbon number in the linear alcohol homologous series, and the increase in enthalpy of combustion, which supports my hypothesis. Thus with the investigation of this experiment, it is to be concluded that, ignoring the cost of production, the more carbon in a alcohol, the more energy is released from the combustion of the molecule with oxygen.

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