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To investigate the enthalpy change of combustion for various alcohols.
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Chemistry Coursework P l a n n i n g Aim: To investigate the enthalpy change of combustion for various alcohols Alcohols will be burnt to heat up water. The aim is to find out how much energy is produced when burning the following alcohols : ethanol, propanol and butanol. Alcohols react with oxygen in the air to form carbon dioxide, water and energy is liberated (exothermic reaction), because the reactants' energy is higher than that of the products'. The alcohols form a series of compounds which are related to each other. This is called a homologous series and has the formula : Cn H 2n+1 OH In this investigation the alcohols used were: ethanol, propanol and butanol. Ethanol : C2H5OH Propanol : C3H7OH Butanol : C4H9OH Combustion Reactions: Ethanol : C2H5OH + 3O2 2CO2 + 3H2O + heat Propanol : C3H7OH + 4.5O2 3CO2 + 4H2O + heat Butanol: C4H9OH + 6O2 4CO2 + 5H2O + heat Heat (joules) =...
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