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The differences between the Enthalpy Changes of Combustion of the alcohols

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Introduction

The differences between the Enthalpy Changes of Combustion of the alcohols

Hypothesis

The differences between the Enthalpy Changes of Combustion of the alcohols when calculated using bond enthalpy values are as follows:

Methanol → Ethanol : 587kJ

Ethanol → Propan-1-ol : 617kJ

Propan-1-ol → Butan-1-ol : 617kJ

I shall check to see the differences

...read more.

Middle

Ethanol → Propan-1-ol : 606kJ

Propan-1-ol → Butan-1-ol : 233kJ

I would say that the first two were fairly normal, and it is because the measured value for Butan-1-ol was so low, that the difference between that and Propan-1-ol was so low. This means that this hypothesis

...read more.

Conclusion

class="c2">Energy Produced Using Bond Energies:         1274 kJ

Measured Energy Value:        822 kJ

Propan-1ol:

Energy Produced Using Bond Energies:         1891 kJ

Measured Energy Value:        1431 kJ

Butan-1-ol:

Energy Produced Using Bond Energies:         2508 kJ

Measured Energy Value:        1702 kJ

Bibliography

The other sources that I have used for information on this investigation are:

Salter’s Chemical Ideas Book

...read more.

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