Question

Write a relation between ΔG and Q and define the meaning of each term and answer the following :

(a) Why a reaction proceeds forward when Q < K and no net reaction occurs when Q = K.

(b) Explain the effect of increase in pressure in terms of reaction quotient Q. for the reaction : CO (g) + 3H₂ (g) ⇄ CH₄ (g) + H₂O (g)

Answer 1

If Q < K, ΔG will be negative. Reaction proceeds in the forward direction.

If Q = K, ΔG = 0, no net reaction.

[Hint: Next relate Q with concentration of CO, H₂, CH₄ and H₂O in view of reduced volume (increased pressure). Show that Q < K and hence the reaction proceeds in forward direction.]