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Question

The Gibbs energy for the decomposition of Al2O3 at 5000C is as follows:
23Al2O343Al+O2
ΔrxnG=+960 kJmol1.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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