At 298 K, the f G values for Li 2 O(s) and Li 2 O 2

At 298 K, the Δ_fG° values for Li₂O(s) and Li₂O₂(s) suggest that Li₂O₂(s) is thermodynamically more stable than Li₂O(s). At 1000 K, however, the situation is reversed. The standard Gibbs energies of formation, Δ_fG°, for Li₂O(s) and Li₂O₂(s) are –466.40 kJ mol‾¹ and –419.02 kJ mol‾¹, respectively, at 1000 K. Calculate the equilibrium constant for the following reaction at 1000 K and the equilibrium partial pressure of O₂(g) above a sample of Li₂O₂(s) at 1000 K.

Transcribed Image Text:

Li₂O₂ (s)- 1 Li₂O(s) + O₂(g) 2