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Comparing the Enthalpy Changes of Combustion of Different Alcohols I am going to perform an investigation with the aim of finding the enthalpy change of combustion (?Hc) of several different alcohols. I will then compare these results and attempt to show how and why the ?Hc of an alcohol varies according to its molecular structure. Planning Equipment apparatus and materials: * Copper calorimeter * Metal draught excluder * Thermometer * Digital scales (capable of mass readings given to at least 2 d.p.) * Clamp stand * Spirit burners containing the alcohols which will be investigated: o Methanol (CH3OH) o Ethanol (C2H5OH) o Propan-1-ol (C3H7OH) o Propan-2-ol (C3H7OH) o Butan-1-ol (C4H9OH) Method Set up apparatus as shown in the diagram Pour 200 cm³ water into the copper calorimeter Take initial temperature reading of water Weigh the spirit burner with the lid on Light spirit burner Stir water often and extinguish the spirit burner once the water temperature has risen by around 20°C Take final temperature of water Weigh the spirit burner with lid Diagram The metal...

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