The Gibbs energy for the decomposition of Al2O3 at 500°C is as follows:$\dfrac{2}{3}$Al2O3 → $\dfrac{4}{3}$Al + O2, ΔrG = +966 kJ mol–1The potential difference needed for electrolytic reduction of Al2O3 at 500°C is at least

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Q:9

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

$\dfrac{2}{3}$Al₂O₃ → $\dfrac{4}{3}$Al + O₂, Δ_rG = +966 kJ mol^–1

The potential difference needed for electrolytic reduction of Al₂O₃ at 500°C is at least

2.5 V

5.0 V

4.5 V

3.0 V

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Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is 100 Ω. The conductivity of this solution is 1.29 S m^–1. Resistance of the same cell when filled with 0.2 M of the same solution is 520 Ω. The molar conductivity of 0.02 M solution of the electrolyte will be

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