Solution - Application of Thermodynamic Principles of Metallurgy

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The reaction, Cr_2O_3 + 2Al -> Al_2O_3 + 2Cr   (triangleG^theta = -421 kJ) is thermodynamically feasible as is apparent from the Gibbs energy value.  Why does it not take place at room temperature?

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Reference Material

Solution for concept: Application of Thermodynamic Principles of Metallurgy. For the courses 12th CBSE (Arts), 12th CBSE (Commerce), 12th CBSE (Science), PUC Karnataka Science
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