Solubility and thermodynamic properties of flonicamid in pure and binary solvents in the temperature range of 283.15 ∼ 323.15 K

Specific heat and thermal expansion measurements have been performed on Nd1−xLUxMn2 in the temperature range between 1.5K and 300K. Below 10K, anomalies are observed which are ascribed to a spin reorientation of the Nd sublattice. These anomalies are only slightly affected by the substitution of Nd by Lu. Large effects, however, are observed on the magnetic properties of the Mn sublattice. The antiferromagnetic order disappears for x exceeding 0.30. The data are analysed in terms of Grüneisen parameters. In the paramagnetic compound LuMn2, a spin-fluctuation contribution to the thermodynamic properties is observed. In the Nd-containing compounds, distinct contributions from the crystal field acting on the Nd ions can be distinguished. The variation of the magnetic properties of the Mn sublattice with the concentration of Lu is discussed.

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Solubility and thermodynamic properties of nimodipine in pure and binary solvents at a series of temperatures

The Journal of Chemical Thermodynamics ◽

10.1016/j.jct.2020.106259 ◽

2021 ◽

Vol 152 ◽

pp. 106259 ◽

Cited By ~ 1

Author(s):

Shuai Yu ◽

Wenguo Xing ◽

Fumin Xue ◽

Yan Cheng ◽

Bing Li

Keyword(s):

Thermodynamic Properties ◽

Binary Solvents

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Temperature Dependent Solubility of Benzoic Acid in Aqueous Phase and Aqueous Mixtures of Aliphatic Alcohols

Zeitschrift für Physikalische Chemie ◽

10.1515/zpch-2019-1495 ◽

2020 ◽

Vol 234 (11-12) ◽

pp. 1771-1787

Author(s):

Sayyar Muhammad ◽

Sofia Sanam ◽

Hamayun Khan ◽

Akhtar Muhammad ◽

Sabiha Sultana

Keyword(s):

Benzoic Acid ◽

Aqueous Phase ◽

Linear Trend ◽

Pure Water ◽

Binary Solvents ◽

Aqueous Mixtures ◽

Analytical Technique ◽

Temperature Range ◽

Acid Solubility ◽

Ethanol In Water

AbstractThe benzoic acid solubility in aqueous phase and in various aqueous mixtures of methanol, ethanol and 2-propanol was determined at temperatures ranging from 303 to 333 K by an analytical technique. The results showed that the solubility of the acid in alcohols-water binary mixtures is high as compared to pure aqueous phase. The addition of alcohols to water favors the dissolution of benzoic acid which increases further with the increase in alcohols content of water within the investigated temperature range. The benzoic acid solubility in water alone and aqueous mixtures of the selected alcohols was in the order of; 2-propanol in water > ethanol in water > methanol in water > pure water. It is also observed that within the investigated temperature range, the acid solubility increases with rise in temperature in both the aqueous phase and alcohols-water binary solvents. The logarithm of the mole fraction of the acid’s solubility also showed a linear trend against the temperature. The experimental results obtained in the current study were compared with the reported literature for the studied acid and other organic acids in various solvents and showing a good agreement. The study will have implications in the processes involving separation, crystallization and pharmaceutical formulation in various industries.

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