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Stephanie Wickers 8th November 2004 Comparing the enthalpy changes of different alcohols In this coursework, I am going to find the enthalpy change of combustion of a number of different alcohols so that I can investigate why and how the enthalpy change is affected by the molecular structure of the alcohol. The enthalpy change of combustion is the energy given off when one mole of a fuel is completely burned in oxygen, under standard conditions. I carried out a practical trial experiment to find out the enthalpy changes of hexane and methanol. I calculated the enthalpy changes of combustion of the two fuels and found that they were completely different to the data book values. This would probably have mainly been down to the heat loss to the surroundings. I have learned from the trial experiment that I need to improve my method of preventing this. If I use the same equipment, set up in...

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