Question
The standard Gibbs energy change at 300 K for the reaction, 2A ⇌ B +C is 2494.2J at a given time, the composition of the reaction mixture is
and 
, The reaction proceeds in the [R= 8.314 JK/mol, e = 2.718]
-
forward direction because Q>Kc
-
reverse direction because Q>Kc
-
forward direction because Q < Kc
-
reverse direction because Q < Kc
Solution
B.
reverse direction because Q>Kc
We know,
ΔG = ΔGo + RTlnQ .. (i)
Given,
ΔGo = 2494.2J
thus,
putting the value in equation (i)
= 2494.2 +8.314 + 300 In 4
= 28747.27 J
= positive value
Also, we have
If ΔG is positive, Q >K
therefore, reaction shifts in the reverse direction
