In a neutralization reaction in a well-insulated calorimeter, 112.9 g of 1.2915 M NAOH were added to 129.1 g of 1.1294 M HCI. The following data were obtained. Assume the density of each solution is 1.00 g/mL. The temperature of the solution rose 8.10 °C. a. Assuming the calorimeter, thermometer, and stirrer have a negligible impact on the AHren, calculate the AHren (in kJ) for this reaction. -9 rraction -9 ution

Chemistry for Engineering Students
3rd Edition
ISBN:9781285199023
Author:Lawrence S. Brown, Tom Holme
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Chapter9: Energy And Chemistry
Section: Chapter Questions
Problem 9.79PAE: A student performing a calorimetry experiment combined 100.0 ml. of 0.50 M HCI and 100.0 ml. of 0.50...
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I need help answering 4a.
YOT EXPERIMENT 8
HEATS OF REACTION
mol
4. In a neutralization reaction in a well-insulated calorimeter, 112.9 g of 1.2915 M NaOH
were added to 129.1 g of 1.1294 M HCI. The following data were obtained. Assume
the density of each solution is 1.00 g/mL. The temperature of the solution rose 8.10
°C.
a. Assuming the calorimeter, thermometer, and stirrer have a negligible impact on the
AHren, calculate the AHrxn (in kJ) for this reaction. -9
reaction
=9 solution
ons:
b. Calculate the AHPX per mole of NaOH reacted.
c. If the Styrofoam calorimeter (s = 1.131 J/g °C) weighs 30.0 g, the glass
thermometer (s = 0.840 J/g °C) weighs 20.0 g, and the aluminum stirrer (s = 0.900
J/g °C) weighs 10.0 g, calculate the AHrxn per mole of NaOH reacted.
malch
8.314
d. The literature value of this reaction is -55.9 kJ/mole. Qualitatively compare the
AHrxn from (c) and (d) and comment on the effects the calorimeter, thermometer,
and stirrer have on the AHrxn and if they can be considered negligible in the
calculations.
Transcribed Image Text:YOT EXPERIMENT 8 HEATS OF REACTION mol 4. In a neutralization reaction in a well-insulated calorimeter, 112.9 g of 1.2915 M NaOH were added to 129.1 g of 1.1294 M HCI. The following data were obtained. Assume the density of each solution is 1.00 g/mL. The temperature of the solution rose 8.10 °C. a. Assuming the calorimeter, thermometer, and stirrer have a negligible impact on the AHren, calculate the AHrxn (in kJ) for this reaction. -9 reaction =9 solution ons: b. Calculate the AHPX per mole of NaOH reacted. c. If the Styrofoam calorimeter (s = 1.131 J/g °C) weighs 30.0 g, the glass thermometer (s = 0.840 J/g °C) weighs 20.0 g, and the aluminum stirrer (s = 0.900 J/g °C) weighs 10.0 g, calculate the AHrxn per mole of NaOH reacted. malch 8.314 d. The literature value of this reaction is -55.9 kJ/mole. Qualitatively compare the AHrxn from (c) and (d) and comment on the effects the calorimeter, thermometer, and stirrer have on the AHrxn and if they can be considered negligible in the calculations.
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