Home
Class 12
CHEMISTRY
The reaction, Cr(2)O(3)(s) + 2Al(s) to A...

The reaction, `Cr_(2)O_(3)(s) + 2Al(s) to Al_(2)O_(3) +2 Cr, DeltaG^(@)= -421 KJ`
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 reactants are solids, so they cannot react in the present state or at room temperature. When the temperature is elevated, reactants melt and the reaction proceeds. Therefore, a higher temperature is required.
Promotional Banner

Topper's Solved these Questions

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    ARIHANT PUBLICATION|Exercise PART II THERMODYNAMIC AND ELECTROCHEMICAL PRICIPLES OF METALLURGY (QUESTIONS FOR PRACTICE) Short Answer Type Il Questions|9 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    ARIHANT PUBLICATION|Exercise PART II THERMODYNAMIC AND ELECTROCHEMICAL PRICIPLES OF METALLURGY (QUESTIONS FOR ASSESSMENT) ( MULTIPLE CHOICE TYPE QUESTIONS )|2 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    ARIHANT PUBLICATION|Exercise PART II THERMODYNAMIC AND ELECTROCHEMICAL PRICIPLES OF METALLURGY (QUESTIONS FOR PRACTICE) Very Short Answer Type Questions |9 Videos

  • F-BLOCK ELEMENTS

    ARIHANT PUBLICATION|Exercise CHAPTER PRACTICE (LONG ANSWER TYPE QUESTIONS) |2 Videos

  • GROUP 16 ELEMENTS: OXYGEN FAMILY

    ARIHANT PUBLICATION|Exercise CHAPTER PRACTICE (LONG ANSWER TYPE QUESTIONS)|2 Videos

Similar Questions

Explore conceptually related problems

Although the reduction of Cr_(2)O_(3) with Al is thermodynamically feasible, yet it does not occur at room temperature. Why?

In the reaction , Cr_2O_7^(2-) + 14H^+ +6I → 2Cr^(3+) + 7H_2 O +3I_(2 which element is reduced ?

Consider the reaction, Cr_(2) O_(7) ^(2-) + 14 H^(+) + 6e^(-) rarr 2Cr^(3+) + 7 H_(2) O What is the quantity of electricity in coulombs needed to reduce 1 mole of Cr_(2)O_(7)^(2-) ?

For the reaction, CuSO_4.5H_2O(s) hArr CuSO_4.3H_2O(s) + 2H_2O(v) . Which one is correct representation ?

Is the reaction, 2Al +3Fe^(2+)rarr2Al^(3+) +3Fe possible?