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.
![### Chemical Reaction of 2,3-Dimethyl-1,3-butadiene with Hydrogen Bromide
**Reaction Overview:**
- **Reactants:** 2,3-dimethyl-1,3-butadiene + Hydrogen Bromide (HBr)
- **Condition:** -55°C
**Products:**
1. **2-Bromo-2,3-dimethylbutane**
- Structure: The bromine (Br) atom is attached to the second carbon in a chain with two methyl (CH₃) groups branching off.
2. **3-Bromo-2,3-dimethylbutene**
- Structure: The bromine (Br) atom is attached at the end of a chain where a double bond is present, retaining a methyl (CH₃) group.
**Instructions and Feedback:**
- Submit your proposed reaction results after verifying structures.
- **Feedback Message:** "Incorrect; Try Again. Your answer has more carbon atoms than the starting product. Make sure your reaction is balanced."
**Tools and Symbols:**
- Utilize chemical drawing tools for accurate representations.
- The side panel suggests the elemental composition: H, C, N, O, S, Cl, Br, I, P, F.
- Ensure structures conform to these elemental constraints for accuracy.
This exercise highlights the importance of balancing chemical reactions accurately and understanding the structural implications during transformations.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffee9ab06-97b6-4ade-bb2f-4c7ff21a3914%2F4086ec1d-4b85-48ca-a6ee-d026d096be24%2Fw3thjvu_processed.png&w=3840&q=75)
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