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Enthalpy change for different alcohols.
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| Submitted: Fri Oct 31 2003
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Investigation -Enthalpy change for different alcohols: An alcohol is a series of organic, homologous compounds, Alcohols may be classified according to which carbon of the alkyl group is bonded to the hydroxyl group with the general formula CnH2n+1OH. The alcohol reacts with the oxygen in the air to form water and carbon dioxide: The structure of the molecules in this reaction is: This is an exothermic reaction, as heat is given out from the formation of water and carbon dioxide. This is because there is more energy given out when bonds are broken, furthermore less energy is absorbed when bonds are formed therefore the energy left over after the formation (water and carbon dioxide) is given out to the surrounding as heat. This can be shown in an energy level diagram: The values of enthalpy change for any exothermic reaction is always negative as the diagram above shows that energy is 'lost'...
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