Exemplar Problems

Problem 13 : Consider the reaction 2H₂(g) + O₂(g) ⇌ 2H₂O(g). At a certain temperature, the equilibrium constant Kp for this reaction is 2.0 x 10⁶. Calculate the standard Gibbs free energy change (∆G°) at this temperature. (R = 8.314 J/(mol•K))

Solution :

The relationship between ∆G° and Kp is given by the equation: ∆G° = -RT ln(Kp)

∆G° = -8.314 J/(mol•K) * T * ln(2.0 x 10⁶)

To calculate ∆G°, you need to know the temperature (T) at which the equilibrium constant Kp is given.