A 1.09-g sample of dimethyl oxalate (C4H6O4) is burned in a bomb calorimeter and the temperature increases from 25.10 Â°C to 28.14 Â°C. The calorimeter contains 1.09Ã103 g of water and the bomb has a heat capacity of 777 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 dimethyl oxalate burned.

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Sixta KovacekLv2

11 Mar 2019

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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.

A 0.407-g sample of benzil (C₁₄H₁₀O₂) is burned in a bomb calorimeter and the temperature increases from 24.50 Â°C to 27.25 Â°C. The calorimeter contains 1000 g of water and the bomb has a heat capacity of 831 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 benzil burned.

___ kJ/mol

A)A bomb calorimeter, or constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods.
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.
The molar heat of combustion is â7821 kJ per mole of bisphenol A.

C₁₅H₁₆O₂(s) + 18 O₂(g) ------>15 CO₂(g) + 8 H₂O(l) + Energy

Calculate the heat capacity of the calorimeter.
heat capacity of calorimeter =_________ J/Â°C

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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The heat capacity of the calorimeter was determined in a previous experiment to be 847.1 J/Â°C.
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C)

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.