Question

3. The standard Gibbs energy change at 300 K for the reaction 2A =B+C is 2494..
time, the composition of the reaction mixture is [A] => ,[B] = 2 and [C] =-. The reactie 3
proceeds in the: R=8.314J/K mol, e = 2.718]
[2015
(A) reverse direction because Q<K.
(B) Forward direction because Q>K.
(C) Reverse direction because Q> Kc
(D) forward direction because Q<K.​

Answer 1

Answer:

option C is correct

Given values ΔG=2494.2J

Q=$\frac{[B][C]}{[A]^{2} }$

Q=$\frac{2*\frac{1}{2} }{(\frac{1}{2})^{2}  }$

Q=4

we know that

ΔG=Δ$G^{0}$+RTlnQ

    =2494.2+8.314*300ln4

    =28747.27J

It is a positive value

we have

ΔG=RTln$\frac{Q}{K}$

if ΔG is positive Q>K

Then the reaction shifts in reverse direction