In an experiment, a 0.8068 g sample of phthalic acid (C8H6O4) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1.112×103 g of water. During the combustion the temperature increases from 28.49 to 31.18 °C. The heat capacity of water is 4.184 J g-1°C-1.  The heat capacity of the calorimeter was determined in a previous experiment to be 992.1 J/°C. Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of phthalic acid based on these data.

Chemistry: An Atoms First Approach
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ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
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Chapter7: Chemical Energy
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In an experiment, a 0.8068 g sample of phthalic acid (C8H6O4) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1.112×103 g of water. During the combustion the temperature increases from 28.49 to 31.18 °C. The heat capacity of water is 4.184 J g-1°C-1.  The heat capacity of the calorimeter was determined in a previous experiment to be 992.1 J/°C. Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of phthalic acid based on these data.

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