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Question

N subscript 2 end subscript plus 3 H subscript 2 end subscript rightwards harpoon over leftwards harpoon 2 N H subscript 3 end subscript plus h e a t. What is the effect of the increase of temperature on the equilibrium of the reaction?

  1. Equilibrium is shifted to the left  
  2. Equilibrium is shifted to the right  
  3. Equilibrium is unaltered  
  4. Reaction rate does not change  

The correct answer is: Equilibrium is shifted to the left


    N subscript 2 end subscript plus 3 H subscript 2 end subscript rightwards harpoon over leftwards harpoon 2 N H subscript 3 end subscript plus h e a t
    It is an exothermic reaction, so high temperature favours backward reaction. Hence, equilibrium is shifted towards the left.

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