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RESULTS ALCOHOL AVERAGE MASS BURNT (G) METHANOL 1.54 ETHANOL 1.02 PROPAN-1-OL 0.77 BUTAN-1-OL 0.69 PENTAN-1-OL 0.55 HEXAN-1-OL 0.52 Following the gathering of results, the enthalpy change of combustion of the alcohols was calculated using the equation from page 2: Energy Transferred = Mass of water x Temperature rise x specific heat capacity (4.17) Now to calculate the enthalpy change of combustion, the following steps are taken: 1.) Energy per gram = Energy Transferred ÷ Average mass change of alcohol 2.) Energy per mole = Energy per gram x Molecular mass The Energy Transferred from each alcohol is constant as the variables, volume of water (200ml) and temperature rise (15oC) were kept constant. Therefore the calculation of energy transferred from each alcohol is: Energy Transferred = cm?T = 4.17 x 200 x 15 = 12510 J To convert this into KJ, we divide it by 1000 = 12510 ÷ 1000 = 12.510 KJ. Hence 12.510 KJ of energy is transferred by each alcohol to raise 200ml of water by 15oC. The calculations of the...

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