The enthalpy of combustion of benzoic acid c6h5cooh is, Chemistry

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The enthalpy of combustion of benzoic acid c6h5cooh is

The enthalpy of combustion of benzoic acid (C6H5COOH) is commonly used as the standard for calibrating constant-volume bomb calorimeters; its value has been accurately determined to be 3226.7 kJ/mol. When 3.2305g of benzoic acid are burned in a calorimeter, the temperature raised from 20.84 degrees C to 25.67 degrees C. What is the heat capacity of the bomb? (Assume that the quantity of water surrounding the bomb is exactly 2250g)

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