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Combustion of Alcohols Investigation.
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Combustion of Alcohols Investigation PLAN Aim: To find out how much energy is required to burn enough of the following alcohols: methanol, ethanol, propanol and pentanol, in order to heat a beaker of water by 40°. The combustion of an alcohol is an exothermic reaction, meaning that more energy is given off during the process than is being taken in. by knowing the individual bond energies for each bond, we can calculate what the energy values obtained from our investigation should aspire to to be accurate. Each bond (eg. C-H, where the '-' signifies a single bond, or O=O, where the '=' denotes a double bond), have different energies. They are as follows: Bond Bond energy (kJmol-1) C-H O=O C=O H-O C-C C-O 435 497 803 464 347 358 MOLECULE DIAGRAMS The following are the reactions which occur when each alcohol combusts. METHANOL: CH3OH + 11/2 O2 CO2 + 2H2O ETHANOL: CH3CH2OH + 3O2 2CO2 + 3H2O PROPANOL: CH3CH2CH2OH + 41/2...
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