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Papers by Zul Helmi
The Journal of Chemical Thermodynamics, 2009
The solubility measurements of sodium dicarboxylate salts; sodium oxalate, malonate, succinate, g... more The solubility measurements of sodium dicarboxylate salts; sodium oxalate, malonate, succinate, glutarate, and adipate in water at temperatures from (278.15 to 358.15 K) were determined. The molar enthalpies of solution at T = 298.15 K were derived: D sol H m (m = 2.11 mol Á kg À1) = 13.86 kJ Á mol À1 for sodium oxalate; D sol H m (m = 3.99 mol Á kg À1) = 14.83 kJ Á mol À1 for sodium malonate; D sol H m (m = 2.45 mol Á kg À1) = 14.83 kJ Á mol À1 for sodium succinate; D sol H m (m = 4.53 mol Á kg À1) = 16.55 kJ Á mol À1 for sodium glutarate, and D sol H m (m = 3.52 mol Á kg À1) = 15.70 kJ Á mol À1 for sodium adipate. The solubility value exhibits a prominent odd-even effect with respect to terms with odd number of sodium dicarboxylate carbon numbers showing much higher solubility. This odd-even effect may have implications for the relative abundance of these compounds in industrial applications and also in the atmospheric aerosols.
The Journal of Chemical Thermodynamics, 2009
The solubility measurements of sodium dicarboxylate salts; sodium oxalate, malonate, succinate, g... more The solubility measurements of sodium dicarboxylate salts; sodium oxalate, malonate, succinate, glutarate, and adipate in water at temperatures from (278.15 to 358.15 K) were determined. The molar enthalpies of solution at T = 298.15 K were derived: D sol H m (m = 2.11 mol Á kg À1) = 13.86 kJ Á mol À1 for sodium oxalate; D sol H m (m = 3.99 mol Á kg À1) = 14.83 kJ Á mol À1 for sodium malonate; D sol H m (m = 2.45 mol Á kg À1) = 14.83 kJ Á mol À1 for sodium succinate; D sol H m (m = 4.53 mol Á kg À1) = 16.55 kJ Á mol À1 for sodium glutarate, and D sol H m (m = 3.52 mol Á kg À1) = 15.70 kJ Á mol À1 for sodium adipate. The solubility value exhibits a prominent odd-even effect with respect to terms with odd number of sodium dicarboxylate carbon numbers showing much higher solubility. This odd-even effect may have implications for the relative abundance of these compounds in industrial applications and also in the atmospheric aerosols.
The Journal of Chemical Thermodynamics, 2009
The solubility measurements of sodium dicarboxylate salts; sodium oxalate, malonate, succinate, g... more The solubility measurements of sodium dicarboxylate salts; sodium oxalate, malonate, succinate, glutarate, and adipate in water at temperatures from (278.15 to 358.15 K) were determined. The molar enthalpies of solution at T = 298.15 K were derived: D sol H m (m = 2.11 mol Á kg À1) = 13.86 kJ Á mol À1 for sodium oxalate; D sol H m (m = 3.99 mol Á kg À1) = 14.83 kJ Á mol À1 for sodium malonate; D sol H m (m = 2.45 mol Á kg À1) = 14.83 kJ Á mol À1 for sodium succinate; D sol H m (m = 4.53 mol Á kg À1) = 16.55 kJ Á mol À1 for sodium glutarate, and D sol H m (m = 3.52 mol Á kg À1) = 15.70 kJ Á mol À1 for sodium adipate. The solubility value exhibits a prominent odd-even effect with respect to terms with odd number of sodium dicarboxylate carbon numbers showing much higher solubility. This odd-even effect may have implications for the relative abundance of these compounds in industrial applications and also in the atmospheric aerosols.
The Journal of Chemical Thermodynamics, 2009
The solubility measurements of sodium dicarboxylate salts; sodium oxalate, malonate, succinate, g... more The solubility measurements of sodium dicarboxylate salts; sodium oxalate, malonate, succinate, glutarate, and adipate in water at temperatures from (278.15 to 358.15 K) were determined. The molar enthalpies of solution at T = 298.15 K were derived: D sol H m (m = 2.11 mol Á kg À1) = 13.86 kJ Á mol À1 for sodium oxalate; D sol H m (m = 3.99 mol Á kg À1) = 14.83 kJ Á mol À1 for sodium malonate; D sol H m (m = 2.45 mol Á kg À1) = 14.83 kJ Á mol À1 for sodium succinate; D sol H m (m = 4.53 mol Á kg À1) = 16.55 kJ Á mol À1 for sodium glutarate, and D sol H m (m = 3.52 mol Á kg À1) = 15.70 kJ Á mol À1 for sodium adipate. The solubility value exhibits a prominent odd-even effect with respect to terms with odd number of sodium dicarboxylate carbon numbers showing much higher solubility. This odd-even effect may have implications for the relative abundance of these compounds in industrial applications and also in the atmospheric aerosols.