Abstract
Haug [1] has recently presented a general thermodynamic Friedmann-type equation . In this thermodynamic cosmological R_H = ct model, the
freeze-out time is t_f ≈ 2.024 s, and nucleosynthesis starts first after about 697.9 s. The model seems to be leading to potentially also solving the Lithium problem, as it seems to predict a Lithium-7 (7Li/H): ∼ 1.003×10−10, which corresponds to well within 2σ of the observations, while the Λ-CDM model predicts way too much Lithium-7: 7Li/H :∼ 5.0 × 10−10 that is 10σ outside the observations.