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Task and Aim: Compare the enthalpy changes of combustion of different alcohols. To find the enthalpy changes of combustion of different alcohols and draw conclusions on how these values are affected by their molecular structure. I shall experiment with a minimum of five alcohols. Each alcohol I use will be from the homologous series of primary alcohols, e.g. propan-1-ol or pentan-1-ol. By adding a hydroxyl group on the first carbon each time this ensures that there is only one variable between my 5 alcohols, the carbon chain length. Background Theory and Prediction: Energy changes occur whenever a chemical reaction takes place. A reaction that gives out energy and heats the surroundings is called an exothermic reaction; a reaction that takes in energy and cools the surroundings is called an endothermic reaction. When finding the enthalpy changes of combustion of different alcohols, the chemical reactions that take place will be exothermic. This...

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