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  3. Chemistry
  4. In Ellingham diagrams of Δf G oxide formation V s T, which of the following graphs has negative slope?

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Q. In Ellingham diagrams of $\Delta_{f} G$ oxide formation $V s T$, which of the following graphs has negative slope?

General Principles and Processes of Isolation of Elements

Solution:

In Ellingham diagram the slope of $C \rightarrow CO$ is negative because entropy change is negative. Therefore, $\Delta G$ becomes more negative with increase in temperature.