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.
![The image contains several chemical structures labeled from g to l. Here is a description and transcription of each:
g.
- The structure is a straight chain consisting of four carbon atoms. The first carbon is attached to a chlorine atom (Cl) and the fourth carbon to a bromine atom (Br). The structure can be described as 1-chloro-4-bromobutane.
h.
- This structure represents a cyclopropane ring (a triangle) with a methyl group (CH3) attached. This molecule is methylcyclopropane.
i.
- This structure is a branched carbon chain. The main chain consists of four carbon atoms, with a bromine atom (Br) and a chlorine atom (Cl) attached to the second carbon. An ethyl group (CH2CH3) is also attached to the third carbon. This compound can be named as 2-bromo-3-chloro-3-ethylpentane.
j.
- This structure shows a cyclohexane ring with an ethyl group (CH2CH3) and a methyl group (CH3) attached to one carbon on the ring. It's an ethylmethylcyclohexane.
k.
- The structure is a polycyclic framework resembling norbornane. It contains two fused rings forming a bridged bicyclic compound. This is norbornane (a bicyclo[2.2.1]heptane).
l.
- This structure consists of a five-membered carbon ring with an attached hydrogen atom (H) and a three-carbon alkynyl group. It represents an alkynyl cyclopentane.
These structures illustrate various types of organic compounds, including chains, rings, and branched molecules, often used to understand stereochemistry and synthesis in organic chemistry.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F389450d8-f111-499a-811c-3e6b049ffcf7%2F46ec571d-78c7-4576-9821-ee2a70a25541%2Fz5meozj_processed.jpeg&w=3840&q=75)
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Note :- The solution of given question is in accordance with IUPAC nomenclature
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