Use the References to access important values if weeded for this question. Ignit
ID: 1045327 • Letter: U
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Use the References to access important values if weeded for this question. Ignition wires heat Stirrer A bomb calerimeter, or constant volume calorimeter, is a device often used to determine the heat of combustion of fucls and the energy content of foods sample 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 bums a 0.983-g sample of maleic acid (C,H,04) in a bomb calorimeter containing 1000. g of water. The temperature increases from 24.20 C to 26.50 "C. The heat capacity of water is 4.184Jgoc The molar heat of combustion is-1356 kJ per mole of maleic acid Calculate the heat capacity of the calorimeter Insulated Sample Burning outsidedish chamber heat capacity of calorimeter PC sample Combustion (bomb) calorimcte Submit Answer Rstry Entire Group 9 more group attempts remaining MacBook Air 5 7 8Explanation / Answer
Molar mass of Maleic acid (C4H4O4) = 116.1 gm/mol
Number of moles of maleic acid = Mass/molar mass = 0.983/116.1 moles
Heat released by the reaction = Molar heat of combustion * number of moles
=> 1356 kJ * 0.983/116.1
=> 11.481 kJ = 11481 J
Heat gained by water = mass of water * specific heat capacity of water * change in temperature
=> 1000g * 4.184 J/gC * (26.50-24.20)C
=> 9623.2J
Heat gained by calorimter = 11481 - 9623.2 = 1857.8J
Heat capacity of calorimeter * change in temperature = 1857.8J
Heat capacity of calorimeter = 1857.8J/(26.50-24.20)C = 807.74 J/C
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