A 0.312-g sample of phenanthrene (C14H10) is burned in a bomb calorimeter and the temperature increases from 24.30 Â°C to 26.61 Â°C. The calorimeter contains 1.07Ã103 g of water and the bomb has a heat capacity of 919 J/Â°C. The heat capacity of water is 4.184 J g-1Â°C-1. Based on this experiment, calculate ÎE for the combustion reaction per mole of phenanthrene burned.

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18 Dec 2019

A 0.312-g sample of phenanthrene (C₁₄H₁₀) is burned in a bomb calorimeter and the temperature increases from 24.30 Â°C to 26.61 Â°C. The calorimeter contains 1.07Ã10³ g of water and the bomb has a heat capacity of 919 J/Â°C. The heat capacity of water is 4.184 J g^-1Â°C^-1. Based on this experiment, calculate ÎE for the combustion reaction per mole of phenanthrene burned.

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Casey DurganLv2

31 Dec 2019

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___ kJ/mol

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Since the "bomb" itself can absorb energy, a separate experiment is needed to determine the heat capacity of the calorimeter. This is known as calibrating the calorimeter.
In the laboratory a student burns a 0.392-g sample of bisphenol A (C₁₅H₁₆O₂) in a bomb calorimeter containing 1140. g of water. The temperature increases from 25.00 Â°C to 27.40 Â°C. The heat capacity of water is 4.184 J g^-1Â°C^-1.
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A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods.

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C)

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