Problem: When a 0.740 g sample of trinitrotoluene (TNT), C 7H5N2O6, is burned in a bomb calorimeter, the temperature increases from 23.4°C to 26.9°C. The heat capacity of the calorimeter is 534 J/°C, and it contains 675 mL of water. How much heat was produced by the combustion of the TNT sample?

FREE Expert Solution
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FREE Expert Solution

Recall: In a bomb calorimeter, the heat of a reaction is given by: where qcal = heat absorbed by the calorimeter and qsol'n = heat absorbed by water in the calorimeter. The respective equations for the two are as follows: where Ccal = heat capacity of the calorimeter (in J/˚C), m = mass of solution (in g), c = specific heat of solution (in J/g•˚C), and ∆T = change in temperature (final T – initial T, in ˚C).

90% (309 ratings)
Problem Details

When a 0.740 g sample of trinitrotoluene (TNT), C 7H5N2O6, is burned in a bomb calorimeter, the temperature increases from 23.4°C to 26.9°C. The heat capacity of the calorimeter is 534 J/°C, and it contains 675 mL of water. How much heat was produced by the combustion of the TNT sample?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Constant-Volume Calorimetry concept. You can view video lessons to learn Constant-Volume Calorimetry Or if you need more Constant-Volume Calorimetry practice, you can also practice Constant-Volume Calorimetry practice problems .

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