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The Value of DeltaG^(@) for the formati...

The Value of `DeltaG^(@)` for the formation of `Cr_(2)O_(3)` is `-"540KJ mol"^(-1)` and that of `Al_(2)O_(3)` is `-827"KJ mol"^(-1)`. Is the reduction of `Cr_(2)O_(3)` possible with Al ?

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`Cr_(2)O_(3)+2Alrarr Al_(2)O+2Cr, DeltaG^(+)=-827-(-540)=-287kJ`.
For the reduction of `Cr_(2)O_(3)` with `Al, DeltaG^(@)` is negative and hence is possible.
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