Question

The reaction

is

thermodynamically feasible due to –ve value of $\Delta \mathrm { G }$. Why does this reaction not take place at room temperature?

• A. Certain amount of activation energy is essential for thermodynamically feasible reaction also.
• B. Due to high melting point of chromium oxide the reaction does not take place.
• C. Overall value of $\Delta \mathrm { G }$ for the net reaction becomes positive
• D. Molecules of $\mathrm { Cr } _ { 2 } \mathrm { O } _ { 3 }$ and Al are not oriented properly.

Answer 1

Answer: (A)

Certain amount of activation energy is essential for thermodynamically feasible reaction also.

Answer 2

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