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Experiment to investigate the heat of combustion of alcohols.
Member rating: No Rating | Words: | Submitted: Thu Aug 16 2001
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Chemistry AT1 - Experiment to investigate the heat of combustion of alcohols. Introduction. The heat of combustion of alcohols is the change in kJ/mol when 1 mole of the alcohol is burnt in excess oxygen (O2). I will be investigating 6 alcohols, using predictions and a practical to guide me through this experiment and form an overall conclusion. Using formulas and calculations, I can show how much energy is released from these substances, and work out their heat of combustion. From the homologous series of alcohols using the general formula of CnH2n+1OH, I have chosen 6 alcohols, giving the Mr for calculation purposes later on: Mr * Methanol - CH3OH 32 * Ethanol - C2H5OH 46 * Propanol - C3H7OH 60 * Butanol - C4H9OH 74 * Pentanol - C5H11OH 88 * Hexanol - C6H13OH 102 The reactants will produce the products of carbon dioxide and water (CO2): Alcohol + Oxygen Carbon Dioxide + Water I.E: C2 H5 OH + 3O2 2CO2 + 3H2O Apparatus List/Safety Precautions. * Tin can - For holding the water * 200 cm3 water -...
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