The Gibbs energy for the decomposition of Al₂O₃ at 500°Cis as follows:

\(\frac{2}{3} A l_{2} O_{3} \rightarrow \frac{4}{3} A l+O_{2}, \Delta C_{r}=+966 \mathrm{~kJ} \mathrm{~mol}^{-1}\)

The potential difference needed for electrolytic reduction of Al₂O₃ at 500°Cis at least:

Question

The Gibbs energy for the decomposition of Al₂O₃ at 500°Cis as follows:

\(\frac{2}{3} A l_{2} O_{3} \rightarrow \frac{4}{3} A l+O_{2}, \Delta C_{r}=+966 \mathrm{~kJ} \mathrm{~mol}^{-1}\)

The potential difference needed for electrolytic reduction of Al₂O₃ at 500°Cis at least:

Accepted Answer

(B) 3.0 V

The Gibbs energy for the decomposition of Al 2 O 3 at 500 °C is as follows: 2 3 A l_ 2 O_…