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The plot of DeltaG versus temperature fo...

The plot of `Delta`G versus temperature for the formation of oxides of elements is called

A

Ellingham diagram

B

Free energy curve

C

Entropy curve

D

Isobar

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding the Question**: The question asks for the name of the plot that represents the relationship between Gibbs free energy change (ΔG) and temperature for the formation of oxides of elements. 2. **Identifying the Options**: The options provided are: - Option 1: Ellingham diagram - Option 2: Free energy curve - Option 3: Entropy curve - Option 4: Isobar 3. **Analyzing the Correct Option**: - **Ellingham Diagram**: This diagram is specifically used to plot ΔG versus temperature for the formation of oxides of various metals. It helps in predicting the stability of the thermal reduction of ores and indicates the equilibrium temperature between a metal, its oxide, and oxygen. - **Free Energy Curve**: This curve also represents ΔG versus temperature but is primarily used for phase diagrams, indicating stability based on free energy. - **Entropy Curve**: This curve plots the change in entropy (ΔS) against temperature (T) and is related to heat absorption in isothermal processes. - **Isobar**: This is a graph of volume versus temperature at constant pressure and does not involve ΔG. 4. **Conclusion**: Since the Ellingham diagram is specifically defined as the plot of ΔG versus temperature for the formation of oxides, the correct answer is **Option 1: Ellingham diagram**. ### Final Answer: The plot of ΔG versus temperature for the formation of oxides of elements is called the **Ellingham diagram**. ---
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