1. Tardigrade
  2. Question
  3. Chemistry
  4. The reaction Cr2O3 + 2Al → Al2O3 + 2Cr (Δ G° = - 421 kj) is thermodynamically feasible due to -ve value of Δ G. Why does this reaction not take place at room temperature?

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Q. The reaction $Cr_2O_3 + 2Al \to Al_2O_3 + 2Cr (\Delta G^° = - 421\, kj)$ is thermodynamically feasible due to -ve value of $\Delta G$. Why does this reaction not take place at room temperature?

General Principles and Processes of Isolation of Elements

Solution:

The spontaneous reaction also requires a certain amount of activation energy therefore heating is required.