The entropy versus temperature plot for phases α and β at 1 bar is given. The transition temperature is 600 K and Cₚ,β − Cₚ,α = 1 J mol⁻¹ K⁻¹. The value of entropy change Sβ − Sα (in J mol⁻¹ K⁻¹) at 300 K is ___. [Use ln 2 = 0.69; Sβ − Sα = 0 at 0 K.]