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<p>The solubility of salicylic acid in water, methanol, ethanol, <i>n</i>-propanol, and also in water + methanol/ ethanol/ <i>n</i>-propanol binary solvent mixtures was experimentally measured using the gravimetric method in the temperatures range of 288.15–313.15&#xa0;K. It was discovered that the solubility increases as the rise in temperature. Besides, the solubility values were correlated with temperature by the Apelblat equation, van’t Hoff and <i>λh</i> equation. Thermodynamic functions including Δ<i>H</i><Stack> <sub>soln</sub> <sup>0</sup> </Stack>, Δ<i>G</i><Stack> <sub>soln</sub> <sup>0</sup> </Stack> and Δ<i>S</i><Stack> <sub>soln</sub> <sup>0</sup> </Stack> of salicylic acid in different solvents were obtained from the van’t Hoff equation. These data are helpful to further study the crystallization process of salicylic acid.</p>

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Determination, Correlation, and Thermodynamic Analysis of Solid–Liquid Phase Equilibrium of Salicylic Acid in Pure and Mixed Aqueous Solvents at (288.15 to 313.15) K

  • 期刊论文

  • 发表日期：

    2026年7月8日

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  • Atul S. Kale,
  • Sachin S. Kale

摘要

The solubility of salicylic acid in water, methanol, ethanol, n-propanol, and also in water + methanol/ ethanol/ n-propanol binary solvent mixtures was experimentally measured using the gravimetric method in the temperatures range of 288.15–313.15 K. It was discovered that the solubility increases as the rise in temperature. Besides, the solubility values were correlated with temperature by the Apelblat equation, van’t Hoff and λh equation. Thermodynamic functions including ΔH soln 0 , ΔG soln 0 and ΔS soln 0 of salicylic acid in different solvents were obtained from the van’t Hoff equation. These data are helpful to further study the crystallization process of salicylic acid.