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.
![# Classifying Chemical Reactions
In this section, we will categorize the following chemical reactions based on their types: synthesis, decomposition, single exchange, or double exchange.
### Reaction Examples:
1. **Reaction 3:**
\[
\text{N}_2 \,(\text{g}) + 3\text{H}_2 \,(\text{g}) \rightarrow 2\text{NH}_3 \,(\text{g})
\]
- **Type:** Synthesis Reaction
- **Explanation:** Two or more reactants (\(\text{N}_2\) and \(\text{H}_2\)) combine to form a single product (\(\text{NH}_3\)).
2. **Reaction 4:**
\[
\text{C}_6\text{H}_{12}\text{O}_6 \,(\text{aq}) \rightarrow 2\text{C}_2\text{H}_6\text{O} \,(\text{aq}) + 2\text{CO}_2 \,(\text{g})
\]
- **Type:** Decomposition Reaction
- **Explanation:** A single compound (\(\text{C}_6\text{H}_{12}\text{O}_6\)) breaks down into simpler compounds (\(\text{C}_2\text{H}_6\text{O}\) and \(\text{CO}_2\)).
3. **Reaction 5:**
\[
\text{Ca} \,(\text{s}) + \text{Zn(NO}_3\text{)}_2 \,(\text{aq}) \rightarrow \text{Ca(NO}_3\text{)}_2 \,(\text{aq}) + \text{Zn} \,(\text{s})
\]
- **Type:** Single Exchange Reaction
- **Explanation:** The calcium (\(\text{Ca}\)) replaces zinc (\(\text{Zn}\)) in the compound \(\text{Zn(NO}_3\text{)}_2\), forming \(\text{Ca(NO}_3\text{)}_2\) and free zinc (\(\text{Zn}\)).
These examples illustrate the different ways elements and compounds can interact in chemical reactions, either by combining, breaking down, or exchanging components.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4dbd844a-5288-4e1f-bdaf-b70c666aee4d%2F8b9d015b-26a9-45ad-8eec-511987642359%2Fwty84n8_processed.jpeg&w=3840&q=75)
Balance chemical reactions are those in which number of atoms on both side of the equation i.e. left hand side and right hand side are equal. In the given question, it is asked to categorize the given reaction.
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