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Comparing the enthalpy of combustion of various alcohols.
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Comparing the enthalpy of combustion of various alcohols Aim My aim is to find out the energy changes of combusting alcohols. (Methanol, Ethanol, Propanol and Butanol) Background Info Key science Chemistry by Eileen Ramsden says that "an alcohol is a series of organic, homologous compounds, with the general formula CnH2n+1OH." Each member of the series has the O-H group in its molecule. As you go up the homologous series of the alcohols, their physical properties start to vary but their chemical properties remain the same. Alcohols react with the oxygen in the air to form the products water and carbon dioxide: Methanol = CH3OH +1.5O2 CO2 + 2H2O Ethanol = C2H5OH +3O2 2CO2 +3H2O Propanol = C3H7OH +4.5O2 3CO2 +4H2O Butanol = C4H9OH +6O2 4CO2 + 5H2O This is an example of combustion. "Reactions of this kind, which give out energy are exothermic reactions (ex = out; therm = heat)." (Key science Chemistry by Eileen Ramsden)....
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