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

Options

A. Ellingham diagram
B. Free energy curve
C. Entropy curve
D. Isobar

Answer

To solve the question regarding the plot of `Delta G` versus temperature for the formation of oxides of elements, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the name of a specific plot that represents the relationship between Gibbs free energy (ΔG) and temperature for the formation of oxides of elements.

2. **Identifying the Relevant Concept**: In thermodynamics and materials science, the stability of compounds, particularly oxides, can be analyzed through the Gibbs free energy changes associated with their formation at different temperatures.

3. **Recognizing the Diagram**: The plot of ΔG versus temperature for the formation of oxides is known as the **Ellingham diagram**. This diagram is crucial in predicting the feasibility of thermal reduction of metal ores.

4. **Understanding the Ellingham Diagram**: The Ellingham diagram consists of curves that represent the Gibbs free energy change for the formation of various metal oxides as a function of temperature. Each curve corresponds to a specific metal oxide.

5. **Application of the Diagram**: The Ellingham diagram helps in determining the ease of reduction of metal oxides. It indicates at what temperature a metal oxide can be reduced to its metal form using a reducing agent.

6. **Conclusion**: Therefore, the answer to the question is that the plot of ΔG versus temperature for the formation of oxides of elements is called the **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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