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genow.co/lrn/tak akeCovalentActivity.do?locator-assignment-take&takeAssignment; SessionLocator-assignment Use the Relences to access important values if meeded for this question Ignition wires heat sample Stire 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. 1 pts 2req In an experiment, a 0.5709 g sample of xanthone (C13Hg02) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1.341 103 g of water. During the combustion the temperature increases from 23.76 to 26.34 "C. The heat capacity of water is 4.184 J g c Water pes The heat capacity of the calorimeter was determined in a previous experiment to be 907.7 JPC. 1 pts 2req Assuming that no energy is lost to the surroundings, cakculate the molar heat of combustion of xanthone based on these data 2) 14048)4 H2O0) 13 o) Eney Insulated Sample Burning outsidedish chamber sample Molar Heat of Combustion kJmol Combustioa (onb) calorimet

Explanation / Answer

I am solving the first problem as per Chegg guidelines, split the problems into multiple questions for remaining answers as per Chegg guidelines

Q1)

Heat absorbed by water = mass * specific capacity of water * change in temperature

=> 1341g * 4.184 J/gC * (26.34-23.76)C

=> 14475.719 J

Heat absorbed by calorimeter = Heat capacity of calorimeter * change in temperature

=> 907.7 J/C * (26.34 - 23.76)C

=> 2341.866

Total heat absorbed = 14475.719 + 2341.866 = 16817.585J

Molar mass of Xanthone (C13H8O2) = 13 * 12 + 8 * 1 + 2 * 16 = 196 gm/mol

Molar heat = -16817.585 J * 196/0.5709

=> -5773760.37 J = -5773.76 kJ

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