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.
**Options:**
A. (Image A: Chair Conformation with CH₃ at the equatorial position and Br at the axial position)
B. (Image B: Chair Conformation with CH₃ and Br both in axial positions)
C. (Image C: Chair Conformation with CH₃ and Br both in equatorial positions)
D. (Image D: Chair Conformation with Br at the equatorial position and CH₃ at the axial position)
**Explanation of Diagrams (A - D):**
- **Image A:** Shows a chair conformation with a methyl group (CH₃) positioned equatorially and a bromine (Br) atom positioned axially.
- **Image B:** Shows a chair conformation where both the methyl group (CH₃) and the bromine (Br) atom are positioned axially.
- **Image C:** Shows a chair conformation where both the methyl group (CH₃) and the bromine (Br) atom are positioned equatorially.
- **Image D:** Shows a chair conformation with the bromine (Br) atom positioned equatorially and the methyl group (CH₃) positioned axially.
**Correct Answer:**
The most stable conformation is typically one where the larger substituents are in the equatorial position to minimize steric hindrance. Therefore, select the correct option based on the provided structural information.
- [ ] D.
- [ ] B.
- [ ] C.
- [ ] A.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2b8d26a8-87eb-4d55-9239-418c1bd04690%2Faa4a066f-ec5e-441e-b151-a984b305377c%2Ftqg269x_processed.jpeg&w=3840&q=75)
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