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1)

The standard  Gibbs energy change at  300K for the reaction,   2AB+C  is 2494.2 J.  At a given time , the composition of the reaction mixture is  [A]=12 , [B]=2   and   [C]=12 . The reaction proceeds in the  [ R=8.314 JK/mol, e=2.718]


A) forward direction because Q > Kc

B) reverse direction because Q >Kc

C) forward direction because Q < Kc

D) reverse direction because Q < Kc

Answer:

Option B

Explanation:

 Given,     G0=2494.2J

  Q=[B][C][A]2=2×12(12)2=4

   

  G=G0+RTlnQ

              =2494.2+8.314×300ln4

             =28747.27  J

 =  Positive value

  Also, we have

          G=RTlnQK

 If  G   is positive , Q>K.

 Therefore,   reaction shifts in reverse direction.