Treatment of excess thermodynamic quantities for liquid mixtures

1997 ◽  
Vol 26 (8) ◽  
pp. 749-755 ◽  
Author(s):  
Jacques E. Desnoyers ◽  
Gérald Perron
Keyword(s):  
Liquid Mixtures ◽  
Thermodynamic Quantities ◽  
Excess Thermodynamic Quantities

Excess thermodynamic quantities of D2O water calculated from its Raman O−D stretching spectra

Open Physics ◽  
2005 ◽  
Vol 3 (1) ◽  
Author(s):  
Mircho Georgiev ◽  
Nikolay Goutev ◽  
Zhorro Nickolov ◽  
Georgi Georgiev
Keyword(s):  
Melting Point ◽  
Excess Enthalpy ◽  
Excess Heat Capacity ◽  
Thermodynamic Quantities ◽  
Calorimetric Data ◽  
Good Correspondence ◽  
Excess Thermodynamic Quantities ◽  
Excess Thermodynamic Functions ◽  
Latent Heat Of Melting ◽  
Comparison Of The Results

AbstractExcess thermodynamic functions of D2O water have been calculated from the vibrationally decoupled O−D stretching spectra of very dilute solutions of HOD in H2O. Comparison of the results with reference calorimetric data for water showed a good correspondence for excess heat capacity above the melting point of ice. The excess enthalpy at the melting point also coincides well with latent heat of melting.

The Excess Thermodynamic Quantities of Adsorption of a Binary Nonionic Surfactant Mixture

1999 ◽  
Vol 217 (1) ◽  
pp. 128-136 ◽  
Author(s):  
Makoto Aratono ◽  
Akio Ohta ◽  
Hisanobu Minamizawa ◽  
Norihiro Ikeda ◽  
Hidemi Iyota ◽  
...  
Keyword(s):  
Nonionic Surfactant ◽  
Thermodynamic Quantities ◽  
Surfactant Mixture ◽  
Excess Thermodynamic Quantities ◽  
Nonionic Surfactant Mixture

Heats of mixing in the system acetone – acetic anhydride – carbon disulfide, and the corresponding binary systems, at room temperature

1970 ◽  
Vol 48 (10) ◽  
pp. 1579-1584 ◽  
Author(s):  
A. N. Campbell ◽  
E. M. Kartzmark ◽  
S. C. Anand
Keyword(s):  
Acetic Anhydride ◽  
Carbon Disulfide ◽  
Room Temperature ◽  
Binary Systems ◽  
Thermodynamic Quantities ◽  
Molar Excess ◽  
Heats Of Mixing ◽  
Partially Miscible ◽  
Binary Section ◽  
Excess Thermodynamic Quantities

A simple calorimeter has been devised by means of which the heats of mixing (molar excess heats) of the following systems have been determined at 22 °C: acetone – acetic anhydride; acetone – carbon disulfide; acetic anhydride – carbon disulfide; and a pseudo-binary section of the ternary system acetone – acetic anhydride – carbon disulfide. From these data the partial molar excess heats have been obtained. All systems are very non-ideal except the system acetone – acetic anhydride, which is almost ideal.For the partially miscible system acetic anhydride – carbon disulfide, the excess thermodynamic quantities of mixing, GE, HE, and TSE, have been calculated,

Excess thermodynamic properties of tetraalkyltin compounds with Trans-decalin and highly branched alkanes. Effect of steric hindrance

1986 ◽  
Vol 64 (4) ◽  
pp. 681-688 ◽  
Author(s):  
Hong Phuong-Nguyen ◽  
Geneviève Delmas
Keyword(s):  
Thermodynamic Properties ◽  
Steric Hindrance ◽  
Thermodynamic Quantities ◽  
Flory Theory ◽  
Excess Viscosities ◽  
Branched Alkanes ◽  
Energy Of Mixing ◽  
Excess Thermodynamic Quantities ◽  
The Difference ◽  
Free Energy Of Mixing

Molar excess thermodynamic quantities hE, [Formula: see text], and vE have been measured at 25 °C over the whole composition range for mixtures of four globular Sn(CnH2n+1)4 (SnR4) (n = 1–4) with t-decalin, and 2,2,4,4,6,8,8-heptamethylnonane (br-C16) as well as hE for the same SnR4 compounds with 2,2,4-trimethylpentane (br-C8). The excess viscosities are measured at −20, 25, and 40 °C for the t-decalin + SnR4 systems. By introducing gE in the solution activation energy, the free energy of mixing can be related to and calculated from the excess viscosities. The steric hindrance contribution, corresponding to an increase of order or diminution of mobility in solution, known to occur either with compounds having highly substituted atoms or with flat-shaped molecules, was investigated. The free volume contribution to the different thermodynamic properties is calculated from the Prigogine–Patterson–Flory theory. The difference between the experimental and calculated excess data is associated with the steric hindrance contribution. Values of hE, [Formula: see text], vE, and sE confirm the existence of a large steric hindrance contribution (hE < −200 J mol−1 and TsE < −400 J mol−1 for two systems). Another contribution, found to occur for the two smaller globular SnR4, may originate in the liberation of movement induced in solution by the second component.

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