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.
part c
![Table 4.
Unknown Equilibrium
Equilibrium
Equilibrium
Keg
concentration concentration concentration
of {FENCS2+} |
in unknown
solution(M)
3.7 x 10-5M 9.6x 10-4M 1.6x 10-4M
6.2 x 10-5M 9.4x 10-4M 3.4x 10-4M
solution
[Fe3+] (M)
[SCN-] (M)
2.4 x 102
2
1.9 x 102
1.1 x 10-4M 8.9x 10-4M
1.1 x 10-4M 8.9x 10-4M
4.9x 10-4M
6.9 × 10-4M
3
2.5 х 102
4
1.8 x 102
1.8 x 10-4M 8.2x 10-4M
8.2 x 10-4M
2.7 х 102](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F688553c1-a29d-4d73-a765-adb59e2cd2b6%2F17126c6b-4c48-4108-adcd-c956bf187c1e%2F0lf5p8_processed.png&w=3840&q=75)
![5. Compare the values of K for each of the five solutions:
a. Are any of the values outside the sample standard deviation for the set?
b. Does the value of the equilibrium constant change when the concentration of either
the reactants or products is altered? Why or why not? Explain this based on your
calculations of Keg:
c. What caused variation (three reasons) in your values of K.?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F688553c1-a29d-4d73-a765-adb59e2cd2b6%2F17126c6b-4c48-4108-adcd-c956bf187c1e%2Feqrley4_processed.jpeg&w=3840&q=75)
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