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# the heat capacity of the calorimeter

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Benzoic acid (C6H5COOH) is sometimes used as a standard to determine the heat capacity of a bomb calorimeter.

When 1.44 g C6H5COOH is burned in a calorimeter that is being calibrated, the temperature rises from 19.18 degrees Celsius to 22.93 degrees Celsius. What is the heat capacity of the calorimeter? The heat of combustion of benzoic acid is -26.42 kJ/g.

https://brainmass.com/chemistry/acids-and-bases/heat-capacity-calorimeter-177383

## SOLUTION This solution is FREE courtesy of BrainMass!

The temperature change is
deltaT = 22.93 - 19.18 = 3.75 ºC

The heat involved by the 1.44 g benzoic acid is
Q = mq = 1.44 g * (26.42 k/g) =38.0448 kJ

therefore, the heat capacity of the calorimeter is
C = Q / deltaT = 38.0448 kJ / 3.75 ºC = 10.15 kJ/ºC.

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