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The enthalpy of combustion of benzoic acid(C6H5COOH) which is often used to calibratecalorimeters, is −3227 kJ/mol. When 1.316 gof benzoic acid was burned in a calorimeter, the temperature increased by 2.226◦C. What is the overall heat capacity of the calorimeter? The overall heat capacity includes the calorimeter hardware and the water that is in it.
Answer in units of kJ/◦C

  • Chemistry - ,

    mols benzoic acid = grams/molar mass = 1.316/122.123 = ?
    delta H combustion = 3227 x mols benzoic acid.
    Then Ccal = delta H/delta T.

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