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Which of the following reactions lies to the right, favoring the formation of products, and which lies to the left, favoring formation of reactants?

(A) 2NO(g)+O2(g)⇌2NO2(g); Kp=5.0×1012
(B) 2HBr(g)⇌H2(g)+Br2(g); Kc=5.8×10−18

Respuesta :

Answer:

For A: The reaction is lying towards right.

For B: The reaction is lying towards left.

Explanation:

There are 3 conditions:

  • When [tex]K_{c};K_p>1[/tex]; the reaction is product favored.
  • When [tex]K_{c};K_p<1[/tex]; the reaction is reactant favored.
  • When [tex]K_{c};K_p=1[/tex]; the reaction is in equilibrium.
  • For A:

The given chemical equation follows:

[tex]2NO(g)+O_2(g)\rightleftharpoons 2NO_2(g)[/tex]

The equilibrium constant in terms of pressure given to us is [tex]5.0\times 10^{12}[/tex]

The given value is very high than 1. So, the reaction is favoring the formation of products.

Hence, the reaction is lying towards right.

  • For B:

The given chemical equation follows:

[tex]2HBr(g)\rightleftharpoons H_2(g)+Br_2[/tex]

The equilibrium constant in terms of concentration given to us is [tex]5.8\times 10^{-18}[/tex]

The given value is very low than 1. So, the reaction is favoring the formation of reactants.

Hence, the reaction is lying towards left.

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