From these coofficients, enthalpy of solution and entropy of solution, excess enthalpy and excess entropy were calculated, Finaly, the selectivity of the liquid crystal solvents were interpreted in terms of the thermodynamic resules.
The thermodynamic parameters as dissolving enthalpy △H,dissolving entropy △S and free energy △G for aromatic compounds of different structures on the fixed liquids calixarene crown ether silicone(MC[4]C5PSO)and calixarene tetrabenzyl ether silicone(C[4]TBEPSO)were separated and determined.
Studies of Particular Selectivity for Liquid-Crystal GC-Stationary Liquid IV. Use of the Enthalpy Differences of Dissolution, Δ(ΔH)_(L-LC), and the Corresponding Entropy Differences, Δ(ΔS)_(L-LC)
Some thermodynamic functions in the dissolution process such as enthalpy and entropy were calculated,and alcohol concentration had relatively greater effect on enthalpy than on entropy.
The effect of temperature on the solubility of ionic surfactants was interpreted in terms of standard enthalpy and entropy of dissolution at reference temperature by considering the change in the heat capacity.
The concentration dependences of the enthalpy and the entropy of dissolution of oxygen in uranium-cerium oxide are calculated and constructed and it is determined that these dependences vary strongly at near-stoichiometric composition.
The molar entropy of dissolution increases as the alloy becomes more concentrated, indicating that internal order within domains also increases correspondingly.
The entropy of solution affects the solubility of ammonium chloride in acetonitrile only slightly, in contrast to dioxane and 2-propanol in which the entropies of solution are significant and have opposite signs.
It is shown that the relative molar entropy of solution is proportional to the relative molar enthalpy of solution and a variation of rotational entropy during solution.
A equation between the thermodynamic properties and the retention values of capillary gas chromatography was proposed. The thermodynamic properties of nitromethylaniline isomers on cros3linking SE-30,SE-54 and noncrosslinking SE-54 fused silica capillary columns have been calculated and the results were interpreted qualitatively.
Thermodynamic results from gas-liquid chromatography (GLC) are reportod for three nonmesorphic solutes-nitrotoluene isomers in the nematic liquid crystal phages of two solvents PBHxB (p-phenylene bis-n-hexyloxybenzoate) and PBHpB (p-phenylene bis-n-heptyloxybenzoate). The specific retention volume can be obtained from retention time. Infinite dilution solute activity coefficients are obtained at several temperature in two nematic phase. From these, the following solute partial molar quantities are determine...