The Gibbs energy for the decomposition of Al2O3 at 5000C is as follows: 23Al2O3→43Al+O2 ΔrxnG=+960kJmol−1.The potential difference needed for the electrolytic reduction of aluminum oxide(Al2O3) at 500oC is:
A
4.5 V
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B
3.0 V
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C
2.5 V
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D
5.0 V
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Solution
The correct option is C 2.5 V Watch the video that follows.