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1) Title: EN4 Determination of Enthalpy Change of Combustion 2) Aim/Objective: To find out the calibration factor of propan-1-ol by burning a measured mass of it in a spirit lamp and use the calibration factor to find out the enthalpy change of combustion of other alcohols (ethanol, butan-1-ol, pentan-1-ol, hexan-1-ol). 3) Results: (1) Calibration of the Calorimeter Molar mass of propan-1-ol 60 Initial mass of spirit lamp + propan-1-ol (m1) 262.63 g Final mass of spirit lamp + propan-1-ol (m2) 261.53 g Mass of propan-1-ol burnt (m1-m2) 1.1 g Number of moles of propan-1-ol burnt (n) 0.01833 mol Initial temperature of calorimeter 17.8? Final temperature of calorimeter 37.8? Temperature raised (?T) 20? Standard enthalpy change of combustion of propan-1-ol ?HC [propan-1-ol (l)] * n -2017kJ/mol Heat energy released during the experiment, E = ?HC [propan-1-ol (l)] * n 36.978kJ Heat energy required for the calorimeter to rise 1 K = E/?T = C (Calibration factor) 1.849kJ/mol (2) Experimental data of other alcohols Ethanol Butan-1-ol Pentan-1-ol Hexan-1-ol Molar mass 46 74 88 102 Initial mass of spirit lamp + alcohol (g) 287.53 276.04 274.04 218.79 Final mass of spirit lamp + alcohol (g) 286.28 274.30 273.10 217.88 Mass of...

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