Which is better reducing agent at 983 K, C or CO ?

Explanation

To determine which is a better reducing agent at 983 K between carbon (C) and carbon monoxide (CO), we can utilize the Ellingham diagram, which is a graphical representation used in metallurgy to show the stability of different oxides and the reducing power of various reducing agents at different temperatures.

### Step-by-Step Solution:

1. **Understanding the Ellingham Diagram**:
- The Ellingham diagram plots the Gibbs free energy change (ΔG) for the formation of oxides as a function of temperature. The lower the line on the diagram, the more stable the oxide and the better the reducing agent.

2. **Identifying the Reactions**:
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