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Calorimetry (Section)Under constant-volume conditions, the
Chapter 3, Problem 60E(choose chapter or problem)
Under constant-volume conditions, the heat of combustion of benzoic acid\(\left(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOH}\right)\) is 26.38 kJ/g. A 2.760-g sample of benzoic acid is burned in a bomb calorimeter. The temperature of the calorimeter increases from \(21.60^{\circ}\) to \(29.93^{\circ}\). (a) What is the total heat capacity of the calorimeter? (b) A 1.440-g sample of a new organic substance is combusted in the same calorimeter. The temperature of the calorimeter increases from \(22.14^{\circ}\) to \(27.09^{\circ}\). What is the heat of combustion per gram of the new substance? (c) Suppose that in changing samples, a portion of the water in the calorimeter were lost. In what way, if any, would this change the heat capacity of the calorimeter?
Questions & Answers
QUESTION:
Under constant-volume conditions, the heat of combustion of benzoic acid\(\left(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOH}\right)\) is 26.38 kJ/g. A 2.760-g sample of benzoic acid is burned in a bomb calorimeter. The temperature of the calorimeter increases from \(21.60^{\circ}\) to \(29.93^{\circ}\). (a) What is the total heat capacity of the calorimeter? (b) A 1.440-g sample of a new organic substance is combusted in the same calorimeter. The temperature of the calorimeter increases from \(22.14^{\circ}\) to \(27.09^{\circ}\). What is the heat of combustion per gram of the new substance? (c) Suppose that in changing samples, a portion of the water in the calorimeter were lost. In what way, if any, would this change the heat capacity of the calorimeter?
ANSWER:Step 1 of 4
Heat capacity refers to the quantity of heat energy that is necessary to cause a modification in the temperature of the given substance. The unit of heat capacity is indicated as J/K. The size of the sample influences the heat capacity of that particular substance. The heat of different reactions can be estimated using a device referred to as the bomb calorimeter.