19. Chemical Thermodynamics

The standard molar entropy for Br₂(g) is 245.46 J/(mol·K) at 25°C. Given that ΔS° = 104.58 J/K for the dissociation of one mole of Br₂(g) into Br(g) at 25°C, find the standard molar entropy for Br(g) at 25°C.

Calculate the change in entropy (ΔS) that occurs in a system when 1.50 mol of isopropyl alcohol melts at its melting point of -89.5°C, given that the enthalpy of fusion (ΔH_fus) is 5.37 kJ/mol.