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.
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Just need part 4
![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
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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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb1ca4019-f596-47d0-9ac7-d83eaf834e41%2F9d47c5ce-d8aa-44d3-a0fd-c0c5cf71b629%2Fn2yrw3_processed.png&w=3840&q=75)
![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
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