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Plan and carry out an investigation to determine which of the four alcohols is the most exothermic.
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Comparing Heat Outputs Of Alcohols By Joanna Lally 11B1 Brief Plan and carry out an investigation to determine which of the four alcohols is the most exothermic. Prediction I predict that the most heat given out per mole burned would be by Propanol because the size of the alcohol molecules might increase with heat. Alcohols produce heat when they burn in oxygen or air. The amount of heat produced per mole of alcohol will be proportional to the amount of air present. Full combustion should generate two products only: carbon dioxide and water vapour. Hypothesis Within a molecule there are bond energies that are holding the atoms together. When the fuel combusts a chemical reaction takes place, this breaks the bonds, this requires energy, and makes new bonds this gives out energy. The energy differences between the two tell us how much energy was given out or taken in. We can show this on a graph. Alcohol...
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