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The reaction Cr2O3+2AltoAl2O3+2Cr (tri...

The reaction
`Cr_2O_3+2AltoAl_2O_3+2Cr` `(triangleG^(ɵ)=-421kJ))`
Is thermodynamically feasible as is apparent from the Gibbs energy value. Why does it not take place at room temperature?

Text Solution

Verified by Experts

The reaction is thermodynamically favourable . Since in the given redox reaction, all the reactants and the products are solids at room temperature , therefore, it does not occur at room temperature .However, at high temperature when chromium melts, the reaction proceeds rapidly. Thus, heating is required for this reaction to start.
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