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The Gibb's energy for the decomposition ...

The Gibb's energy for the decomposition of `Al_(2)O_(3)` at `500^(@)` C is as follows:
`2/3Al_(2)O_(3) to 4/3 Al + O_(2) , DeltaG = +966 kJ mol^(-1)`
The potential difference needed for electrolytic reduction of `Al_(2)O_(3)` at `500^(@)` C is at least

A

5.0 V

B

4.5 V

C

3.0 V

D

2.5 V

Text Solution

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The correct Answer is:
D
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