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Decomposition of Ozone into Oxygen has...

Decomposition of Ozone into Oxygen has

A

`DeltaH=-ve`

B

`DeltaS=-ve`

C

`DeltaH=+ve`

D

All of these

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the decomposition of ozone into oxygen, we need to analyze the thermodynamic properties of the reaction. The decomposition of ozone (O₃) into oxygen (O₂) can be represented by the following chemical equation: \[ 2 \text{O}_3(g) \rightarrow 3 \text{O}_2(g) \] ### Step 1: Determine the Enthalpy Change (ΔH) 1. **Understanding the Reaction**: Ozone is a high-energy molecule compared to diatomic oxygen. When ozone decomposes into oxygen, energy is released. 2. **Classifying the Reaction**: Since energy is released, this reaction is exothermic. 3. **Conclusion about ΔH**: For exothermic reactions, the change in enthalpy (ΔH) is negative. ### Step 2: Determine the Entropy Change (ΔS) 1. **Counting Molecules**: In the reaction, we start with 2 moles of ozone (O₃) and produce 3 moles of oxygen (O₂). 2. **Change in Disorder**: The increase in the number of gas molecules indicates an increase in disorder (entropy). 3. **Conclusion about ΔS**: Since the number of gas molecules increases, the change in entropy (ΔS) is positive. ### Step 3: Summarize the Findings - **ΔH** is negative (exothermic reaction). - **ΔS** is positive (increase in disorder). ### Final Conclusion Based on our analysis: - The correct option for the decomposition of ozone into oxygen is that ΔH is negative and ΔS is positive. ### Answer: ΔH is negative, ΔS is positive. ---
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