Equilibrium Solubility of Sodium 1-Naphthalenesulfonate in Binary NaCl + Water, Na₂SO₄ + Water, and C₂H₅OH + Water Solvent Mixtures from (278.15 to 323.15) K

Abstract

The equilibrium solubility of sodium 1-naphthalenesulfonate in binary NaCl + water, Na 2 SO 4 + water, and C 2 H 5 OH + water solvent mixtures was measured by a steady-state method at elevated temperatures from (278.15 to 323.15) K. The results of these data were correlated by a modified Apelblat equation. The dissolution enthalpy (ΔH d ) and entropy (ΔS d ) of sodium 1-naphthalenesulfonate in solutions of different mole fraction were obtained.