On Ellingham diagrams if two graphs intersect each other, what does the point of intersection indicate ?

Explanation

To answer the question about what the point of intersection indicates on an Ellingham diagram, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Ellingham Diagrams**:
- An Ellingham diagram is a graphical representation that shows the relationship between temperature and the stability of compounds, particularly metal oxides and sulfides. The vertical axis typically represents the Gibbs free energy (ΔG) of formation, while the horizontal axis represents temperature.

2. **Identifying the Graphs**:
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