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25-03-2024
Chemistry

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A 3.85g sample of benzoic acid, C6H5CO2H was burned in a Ni calorimeter (cNi = 0.444 J/goC) having a mass of 0.850kg and filled with 1.250kg of ethanol (cethanol = 2.46 J/goC). The initial temperature of the system was 23.0oC, and the final temperature was 41.9oC. Calculate the heat of combustion (enthalpy change for a combustion reaction) of benzoic acid.

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