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Energy of different alcohols.
Member rating: No Rating | Words: | Submitted: Fri Jan 30 2004
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Energy of different alcohols The measurements recorded were: * Volume of water in the can * Starting temperature of water * Final temperature of water * Change in temperature of water * Start mass of alcohol and spirit burner * Final mass of alcohol and spirit burner * Change in mass of alcohol and spirit burner. Using the mass of water used (1 cm3 water has a mass 1g), temperature rise of the water and specific heat capacity of water (4.2 J raises the temperature of 1g of water by 1°C) the energy transferred from burning the fuel to the water was calculated. This was then converted energy released per mole of fuel (kJ/mol) using the mass of the fuel used and the formula mass of the alcohol. These are the figures given in Table 1. The figures from five groups were averaged. Table 2 Formula masses of the alcohols used Alcohol Formula mass Methanol 32 Ethanol 46 Propanol 60 Butanol 74 Pentanol 88 Hexanol 102 As the alcohol molecule being burnt gets bigger the...
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