NEET 2012 Chemistry question
The Gibbs energy for the decomposition of at is as follows:
Al_2O_3 → Al + O_2; Δ_r G = +960\ kJ mol^{-1}
The potential difference needed for the electrolytic reduction of aluminium oxide () at at least
Answer: (4)
Solution
For the reaction as written, , one mole of is formed from oxide ions: , so (equivalently, ). $Δ
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