Select the coefficients that should be placed in front of each substance to balance the following eaction: ____Mn304 + 0₂ → __Mn₂O3 3 Mn304 ---
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.
![**Balancing Chemical Equations**
Understanding how to balance chemical equations is crucial for accurately representing chemical reactions. Here, we have two sets of reactions where you need to select the correct coefficients to balance the equations.
### i) Balancing Manganese Oxide Reaction
**Reaction:**
\[ \_\_ \text{Mn}_3\text{O}_4 + \_\_ \text{O}_2 \rightarrow \_\_ \text{Mn}_2\text{O}_3 \]
**Select the coefficients that should be placed in front of each substance to balance the following reaction:**
- **3** \(\text{Mn}_3\text{O}_4\)
- \(\_\_ \text{O}_2\)
- \(\_\_ \text{Mn}_2\text{O}_3\)
**Explanation:**
You need to make sure the number of atoms for each element is equal on both the reactant and product sides of the equation. Adjust the coefficients accordingly to achieve balance.
### ii) Balancing Arsenic Sulfide Reaction
**Reaction:**
\[ \_\_ \text{As}_2\text{S}_3 + \_\_ \text{O}_2 \rightarrow \_\_ \text{As}_2\text{O}_3 + \_\_ \text{SO}_2 \]
**Select the coefficients that should be placed in front of each substance to balance the following reaction:**
- \(\_\_ \text{As}_2\text{S}_3\)
- \(\_\_ \text{O}_2\)
- \(\_\_ \text{As}_2\text{O}_3\)
- \(\_\_ \text{SO}_2\)
**Explanation:**
Similar to the first case, ensure the total number of each type of atom is the same on both sides of the equation. By selecting the correct coefficients, you balance the equation and adhere to the Law of Conservation of Mass.
**Note for Educational Use:**
Balancing chemical equations is an essential skill in chemistry that maintains the principle that matter cannot be created or destroyed in a closed system. Practicing with different equations helps in mastering the concept and applying it accurately in various chemical contexts.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F00a73906-77ac-47ec-97a9-97cca7b870cb%2F9ca7c675-b036-4632-876d-3d26b3bac50f%2F2ifyoz5_processed.jpeg&w=3840&q=75)
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