Part 4 Incorrect. Refer to equation 3-11 and remember the ideal gas law. If 1.00 mole of NI3(s) decomposes, calculate the pV work done (in J) on the surroundings. Use the temperature from part 2. i 4.81E3 Hint Save for Later Last saved 1 hour ago. Attempts: 2 of 3 used Submit Answer Saved work will be auto-submitted on the due date. Auto- submission can take up to 10 minutes.

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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Consider the reaction 2NI3(s) → N2(g) + 312(g).
Part 1
Correct!
Using standard enthalpies of formation from Appendix D of the textbook, calculate the enthalpy change of this reaction in kJ mol
1. AH°F (NI3(s)) = 159 kJ/mol
-1.31E2
kJ mol-1
eTextbook and Media
Hint
Attempts: 1 of 3 used
Part 2
Correct!
Calculate the energy change, AU, for this reaction in kJ mol-1 at 16.3 °C.
-1.40E2
kJ mol-1
Hint
Attempts: 1 of 3 used
Transcribed Image Text:Consider the reaction 2NI3(s) → N2(g) + 312(g). Part 1 Correct! Using standard enthalpies of formation from Appendix D of the textbook, calculate the enthalpy change of this reaction in kJ mol 1. AH°F (NI3(s)) = 159 kJ/mol -1.31E2 kJ mol-1 eTextbook and Media Hint Attempts: 1 of 3 used Part 2 Correct! Calculate the energy change, AU, for this reaction in kJ mol-1 at 16.3 °C. -1.40E2 kJ mol-1 Hint Attempts: 1 of 3 used
Part 3
Your Answer
Correct Answer
Your answer is correct.
Why is AH for this reaction less negative than AU?
AH is less negative than AU for all reactions.
Some energy is absorbed because bonds are being broken.
Some energy is used expanding the system from zero moles of gas to four.
This is true of any reaction involving gases.
Hint
Attempts: 3 of 3 used
Part 4
Incorrect. Refer to equation 3-11 and remember the ideal gas law.
If 1.00 mole of NI3(s) decomposes, calculate the pV work done (in J) on the surroundings. Use the temperature from part 2.
i
4.81E3
J
Hint
Save for Later
Last saved 1 hour ago.
Attempts: 2 of 3 used
Submit Answer
Saved work will be auto-submitted on the due date. Auto-
submission can take up to 10 minutes.
Transcribed Image Text:Part 3 Your Answer Correct Answer Your answer is correct. Why is AH for this reaction less negative than AU? AH is less negative than AU for all reactions. Some energy is absorbed because bonds are being broken. Some energy is used expanding the system from zero moles of gas to four. This is true of any reaction involving gases. Hint Attempts: 3 of 3 used Part 4 Incorrect. Refer to equation 3-11 and remember the ideal gas law. If 1.00 mole of NI3(s) decomposes, calculate the pV work done (in J) on the surroundings. Use the temperature from part 2. i 4.81E3 J Hint Save for Later Last saved 1 hour ago. Attempts: 2 of 3 used Submit Answer Saved work will be auto-submitted on the due date. Auto- submission can take up to 10 minutes.
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