The Gibbs energy for the decomposition of Al₂O₃ at 500^(o)C is as follows: 2/3A l₂ O₃ → 4/3Al + O₂, Δ r G = + 966 kJ mol^–1 The potential difference needed for electrolytic reduction of Al₂O₃ at 500^(o)C is at least:

Redox Reactions and Electrochemistry: JEE Main 2010 Chemistry question

JEE Main 2010 · Annual, Paper 1 · Q975

JEE Main 2010Annual, Paper 1ChemistryEasyRedox Reactions and Electrochemistry138× since 2002

The Gibbs energy for the decomposition of Al₂O₃ at 500^oC is as follows :

{2 \over 3}A{l_2}{O_3}

\to

{4 \over 3}Al + {O_2}

{\Delta _r}G

= + 966 kJ mol^–1 The potential difference needed for electrolytic reduction of Al₂O₃ at 500^oC is at least :

JEE Main 2010 · Annual, Paper 1 · Q975

JEE Main 2010Annual, Paper 1ChemistryEasyRedox Reactions and Electrochemistry138× since 2002

The Gibbs energy for the decomposition of Al₂O₃ at 500^oC is as follows :

{2 \over 3}A{l_2}{O_3}

\to

{4 \over 3}Al + {O_2}

{\Delta _r}G

= + 966 kJ mol^–1 The potential difference needed for electrolytic reduction of Al₂O₃ at 500^oC is at least :