Exemplar Problems

Problem 20 : Calculate the standard Gibbs free energy change (∆G°) for the following reaction at 25°C (298 K):

2N₂(g) + 3H₂(g) → 2NH₃(g) Given the equilibrium constant Kc = 5.0 x 10⁴.

Solution :

The relationship between ∆G°, ∆H°, ∆S°, and temperature (T) is given by the equation: ∆G° = ∆H° - T∆S°

To calculate ∆G°, you need to know the values of ∆H° and ∆S° for the reaction, which are not provided in the question. You also need the temperature (T).