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Energy output of Bioethanol and Industrial Ethanol

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Ken Chen Energy output of Bioethanol and Industrial Ethanol Aim The aim of this investigation is to determine which of the two derivatives of ethanol releases more energy, Bioethanol or Industrial Ethanol. Hypothesis The main compound in both alcohols has the same chemical formulae C2H5OH, and the other compounds are unknown therefore the Energy output cannot be calculated exactly by using standard bond enthalpies. However, as the main compound is known and the same for both ethanol's the energy output should be very similar. Therefore the difference in energy output only depends on the compounds which are blended to the alcohols. ...read more.


Follow these steps 10 times, five times for each alcohol. Step 1: Measure 50cm3 of alcohol in a measuring cylinder Step 2: Weigh and record the empty spirit burner Step 3: Fill the 50cm3 of alcohol in the spirit burner Step 4: Weigh and record the filled spirit burner Step 5: Measure 100cm3 of Water in a measuring cylinder Step 6: Fill the water into the metal can Step 7: Set up the Apparatus as displayed (1 draught shield in each direction, south, north, west and east, forming a box around the apparatus; assure there are 2cm of space between the bottom of the metal can and the cotton wick) ...read more.


The whole experiment takes place at room temperature. - Volume of Water: 100cm3 - Mass of alcohol: 50cm3 filled in spirit burner. The mass will be measured before and after the experiment to figure how much has been used. - Time: record every 15 seconds - Concentration of alcohol: 1M - Surface area of metal can which flame is heating up: same cans will be used and positioned at same place above the cotton wick to keep this constant. - Length of cotton wick: 0.5cm - Distance from cotton wick to bottom of metal can: 2cm Hazard Warnings - Industrial Ethanol: Highly flammable. Therefore wear gloves and safety spectacles - Bioethanol: Highly flammable. Therefore wear gloves and safety spectacles Chemistry HL - Plan of Investigation 2009 ...read more.

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