Based on the principles depicted in the Ellingham diagram ( vs ), which of the following deductions — Metallurgy and Isolation of Elements Chemistry Question

💡 Solution & Explanation

At intersection, $\Delta G^\circ_{coupled} = 0$. Metals with lower curves have higher oxygen affinity and can reduce oxides of metals on upper curves. Most metal oxide plots have a positive slope, meaning $\Delta G^\circ$ becomes less negative with increasing temperature. The plot for $C \rightarrow CO_2$ has $\Delta S \approx 0$ (1 mole gas to 1 mole gas), yielding a horizontal line, not a steep positive slope.