Question

1. Predict in each of the following whether entropy increases or decreases. 

(i) Sublimation of camphor 

(ii) 4Fe(s) + 3O₂ (g) → 2Fe₂O₃ (g) 

2. The equilibrium constant for a reaction at 30 °C 2.5 x 10^-29 . What will be the value of ∆G?

Answer 1

1. (i) entropy increases 

(ii) entropy increases 

2. 

ΔG^θ = -2.303 RT log K

ΔG^θ =  -2.303 x 8.314 JK^-1 mol^-1 x 300K log x (2.5 x 10^-29)

= 164.3 KJ mol^-1