Question

The Gibbs energy for the decomposition of $A{l}_2{O}_3$ at ${500}^{0}C$ is as follows:
$\frac{2}{3}A{l}_2{O}_3\to \frac{4}{3}Al+O_2$
${\Delta }_{rxn}G=+960kJmo{l}^{-1}$.The potential difference needed for the electrolytic reduction of aluminum oxide$\left(A{l}_2{O}_3\right)$ at ${500}^{o}C$ is:

• A. 4.5 V
• B. 3.0 V
• C. 2.5 V
• D. 5.0 V

Answer 1

The correct option is C 2.5 V

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