In an experiment, the combustion of a food was used to determined the caloric content of the food. First the calorimeter was calibrated to determine the heat capacity of the device. When a current of 1.25 A from at 12.5 V source was used to heat the calorimeter for 139 seconds, termperaturature increase of 3.75 °C was measured. Next, a 0.100 g food sample was burned in the same calorimeter, and a temperature increase of 5.23 °C was measures. Based on this experiment, what was the combusion heat (qc, in J) released as heat for this food sample? J? (Because the heat is known to be released, you do not need the mathematical sign).
In an experiment, the combustion of a food was used to determined the caloric content of the food. First the calorimeter was calibrated to determine the heat capacity of the device. When a current of 1.25 A from at 12.5 V source was used to heat the calorimeter for 139 seconds, termperaturature increase of 3.75 °C was measured. Next, a 0.100 g food sample was burned in the same calorimeter, and a temperature increase of 5.23 °C was measures. Based on this experiment, what was the combusion heat (qc, in J) released as heat for this food sample? J? (Because the heat is known to be released, you do not need the mathematical sign).
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:In an experiment, the combustion of a food was used to determined the caloric content of the food.
First the calorimeter was calibrated to determine the heat capacity of the device.
When a current of 1.25 A from at 12.5 V source was used to heat the calorimeter for 139 seconds, termperaturature increase of 3.75 °C was measured.
Next, a 0.100 g food sample was burned in the same calorimeter, and a temperature increase of 5.23 °C was measures.
Based on this experiment, what was the combusion heat (qc, in J) released as heat for this food sample?
J?
(Because the heat is known to be released, you do not need the mathematical sign).
Expert Solution
Step 1
Heat capacity of calorimeter has units of KJ/°C.
It is calculated as shown in the following step.
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