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Comparing the Enthalpy Changes of Combustion of Different Alcohols
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Comparing the Enthalpy Changes of Combustion of Different Alcohols Aim: I will find the enthalpy change of combustion of a number of alcohols so that I can investigate how and why enthalpy change is affected by molecular structure of the alcohol. Outline: I will use Methanol, Ethanol, Propanol and Butanol in the experiment. I will use these four because they should give me clear results, and they range from short chained to long-chained hydrocarbons, so patterns should be easy to spot in the conclusion. Variables: My independent variables are - The type of alcohol (I will use ethanol, methanol, propanol and butanol) My dependant variables are - the specific heating capacity of water - Mass of water in grams ...T- Change in temperature of water My control variables are - The change in temperature of water- 20..C - The mass of water. If this were changed then all the results would be wrong, because it would take different amounts of...
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