scholarly journals Evaluation of the physical parameters of nano-sized tetrachlorosilane as an inorganic material a mixed solvent using Fuoss-Shedlovsky and Fuoss-Hsia-Fernández-Prini techniques

2020 ◽  
Vol 10 (4) ◽  
pp. 5741-5746
Keyword(s):  
Thermodynamic Parameters ◽  
Association Constant ◽  
Inorganic Material ◽  
Mixed Solvent ◽  
Electrical Conductance ◽  
Molar Conductance ◽  
Energy Of Activation ◽  
Physical Parameters ◽  
Walden Product ◽  
Limiting Molar Conductance

The electrical conductance of nano-sized tetrachlorosilane is measured in 50% mixed solvent of (absolute ethanol-H2O) at various temperatures. The Λ0 (limiting molar conductance) and the KA (association constant) are evaluated via using Fuoss-Shedlovsky (F-SH) and Fuoss-Hsia-Fernández-Prini (FHFP) theories. The standard thermodynamic parameters for association (ΔS°A, ΔH°A& ΔG°A), energy of activation (Ea), hydrodynamic radii (RH) and Walden product (Λ0 η0) are calculated for tetrachlorosilane. These various physical parameters for tetrachlorosilane are evaluated and discussed.

scholarly journals Ion-Conductance and Solvation Behavior of Benzyl Trimethyl Ammonium Chloride in Aqueous-Methanol Mixtures

2019 ◽  
Vol 9 (2) ◽  
pp. 3212-3214 ◽  
Keyword(s):  
Ammonium Chloride ◽  
Molar Conductance ◽  
Dimethyl Formamide ◽  
Trimethyl Ammonium Chloride ◽  
Aqueous Methanol ◽  
Walden Product ◽  
Ion Conductance ◽  
Solvent Interactions ◽  
Aqueous Solvent ◽  
Limiting Molar Conductance

Ion-conductance and solvation conduct associated with diverse electrolytes in solvents is recited to be shaped by numerous aspects like density, viscosity, dielectric constant of medium, ion-solvent relations and solvent-solvent actions. Ion-solvent interactions soothe the ion by solvating it. Conductance statistics and viscosity numbers of distant electrolytes is of use in analyzing the ion solvent relations and solvation behavior of the ions. Conductance and ion-solvation behavior of benzyl trimethyl ammonium chloride has been measured in aqueous methanol and aqueous dimethyl formamide of different composition in the temperature range of 283K to 318K. Limiting molar conductance dissociation constant of the ion pair, KC are figured using Fuoss-Kraus Limiting Law. 0 rise with percentage of water in the solvent fusion. KC value is highest in pure aqueous solvent. Walden product is highest in 20% aqueous-methanol mixture signifying that ion-solvent interactions are highest at this composition of solvent combination and Walden .product as a function of the specific ion-solvent interactions including structural effects.

scholarly journals Conductometric Study of Nimesulide in Aqueous Solutions of Hydrotropic Agents at Different Temperatures

2012 ◽  
Vol 9 (1) ◽  
pp. 21-26 ◽  
Author(s):  
Chandravir S. Solanki ◽  
Paresh Mishra ◽  
Mahesh Kumar Talari ◽  
Minaketan Tripathy ◽  
Upendra N. Dash
Keyword(s):  
Aqueous Solutions ◽  
Thermodynamic Parameters ◽  
Sodium Benzoate ◽  
Sodium Salicylate ◽  
Molar Conductance ◽  
Association Constants ◽  
Sodium Bromide ◽  
Limiting Molar Conductance ◽  
Different Temperatures ◽  
Conductometric Study

Conductance values of nimesulide have been determined in water in 0.1, 0.2, 0.4, 0.6, 0.8, 1 and 2 mol dm-3aqueous solutions of hydrotropic agents (sodium benzoate, sodium salicylate, sodium bromide and nicotinamide) at temperatures 298.15, 303.15, 308.15 and 313.15 K. The conductance values have been used to evaluate the limiting molar conductance and association constants by means of Shedlovsky extrapolation technique. Thermodynamic parameters for the association process of nimesulide in aqueous solutions of hydrotropic agents have also been calculated.

Heat Power Determination of Dv-290 Refrigerator’s Evaporator on the Basis of Thermodynamic Parameters of Inlet Air / Określenie Mocy Cieplnej Parownika Chłodziarki Dv-290 Na Podstawie Parametrów Termodynamicznych Powietrza Wlotowego

2012 ◽  
Vol 57 (4) ◽  
pp. 911-920
Author(s):  
Bernard Nowak ◽  
Zbigniew Kuczera
Keyword(s):  
Thermodynamic Parameters ◽  
Thermal Power ◽  
Correlation Coefficients ◽  
Specific Humidity ◽  
Physical Parameters ◽  
Air Cooling ◽  
Regression Equations ◽  
Evaporation And Condensation ◽  
Before And After ◽  
The Given

Abstract The present paper introduces a method for calculating the thermal power of DV-290 mining air cooler’s evaporator. The power usually differs from the nominal power given by the manufacturer. The thermodynamic parameters of cooled air are not obtained as a result of in situ measurements, but in indirect manner that is by determining the evaporation and condensation’s pressure values of R407C refrigerant. The pressure dependencies formulated as a function of air enthalpy at the evaporator’s inlet were obtained using calculations of a computer program which solves the system of equations describing heat and mass transfer in the refrigerator’s compressor on the basis of previous measurements of air performed before and after its cooling. The obtained dependencies are demonstrated in a graphical (fig. 2 and fig. 3) and analytical (the regression equations (19) and (20)) manner, the values of correlation coefficients are also presented. For the known evaporation and condensation pressure values of the refrigerant, and thus for its basic physical parameters the complete thermal power of the evaporator was determined, that is its: air cooling overt power, dehumidification occult power, temperature, relative humidity and specific humidity of air after its cooling. In addition, using the mentioned method, the capacity of DV-290 refrigerator’s evaporator is provided for the given thermodynamic parameters of air before cooling, along with air thermodynamic parameters after cooling.

scholarly journals Conductometric studies of 1, 3, 5 –triazinothiocarbamide at different concentration and temperature

2021 ◽  
Vol 16 (2) ◽  
pp. 151-157
Author(s):  
DD Sonone ◽  
ME Shelke ◽  
DT Tayade
Keyword(s):  
Thermodynamic Parameters ◽  
Association Constant ◽  
Ion Association ◽  
Vital Role ◽  
Ion Pair ◽  
Pair Formation ◽  
Drug Diffusion ◽  
Ion Pair Formation

Conductivity plays vital role in drug diffusion. Thermodynamic parameters affected by substituents of drug. Thermodynamic parameters of 1, 3, 5 –triazinothiocarbamide (1a) have been investigated by using conductometrically carried out at different molar concentrations. This work highlights investigation of G, K and µ values. The thermodynamic parameters viz. ΔH, ΔS and ∆G for ion pair formation determine from the value of ion association constant. This technique is suitable and accurate to study of pharmokinetics and pharmodynamics parameters.

scholarly journals A review on conductometric studies of electrolytes in mixed solvent systems to understand ion-ion and ion-solvent interactions

2020 ◽  
Vol 10 (3) ◽  
pp. 5355-5360
Keyword(s):  
Mixed Solvent ◽  
Mixed Solvents ◽  
Chemical Properties ◽  
Electrolyte Solutions ◽  
Molar Conductance ◽  
Extensive Literature ◽  
Solvent Interactions ◽  
Physico Chemical ◽  
Wide Range ◽  
Solvent Systems

The study of ion- solvent interaction is of much importance to investigate the nature of different solutions. Measurement of electrical conductivity and evaluation of physico-chemical properties, such as molar conductance, limiting molar conductance, ion-pair association, Walden product etc. shade light on different intermolecular interactions present in electrolyte solutions. Solvation properties can be varied by mixing two or more solvents. An extensive literature survey on conductometric studies has been carried out on different electrolytes dissolved in a wide range of mixed solvent systems. The reported results show that strong solute-solute, solute-solvent and solvent-solvent interactions are responsible for the physico- chemical behavior of a solution in mixed solvents.

scholarly journals SYNTHESIS, SPECTRAL CHARACTERIZATION AND ANTIMICROBIAL ACTIVITIES OF BIS(CYCLOPENTADIENYL)TITANIUM(IV) COMPLEXES WITH SCHIFF BASES DERIVED FROM5-(SUBSTITUTED ARYL)-2-HYDRAZINO-1, 3, 4-OXADIAZOLE AND INDOLINE-2, 3-DIONE

2021 ◽  
Vol 9 (09) ◽  
pp. 900-909
Author(s):  
Anupama Srivastava ◽  
◽  
Shilpi Srivastava ◽  
Om. P. Pandey ◽  
Soumitra K. Sengupta ◽  
...  
Keyword(s):  
Schiff Bases ◽  
Electrical Conductance ◽  
Antimicrobial Effect ◽  
Antimicrobial Activities ◽  
Molar Conductance ◽  
Bacterial Strains ◽  
Monoclinic Crystal ◽  
Spectral Techniques ◽  
Concentration Method

Titanium(IV) complexes of type[(η5-C5H5)2TiCl(L)] have been synthesized by the reactions of bis(cyclopentadienyl)titanium(IV)dichloride with Schiff bases (LH) derived by the condensation of 5-(substituted aryl)-2-hydrazino-1,3,4-oxadiazole and indoline-2,3-dione in tetrahydrofuranin the presence oftriethylamine. All these complexes are soluble in PhNO2, DMF and DMSO.The complexes were characterized by elemental analyses, electrical conductance, magnetic susceptibility, UV-Vis, IR, 1H NMR, 13C NMR, XRD and SEM spectral techniques. Low molar conductance values indicate that they are non-electrolytes. The spectral data indicate5-coordinate geometry for the complexes.XRD pattern indicate that the complexes have monoclinic crystal system and particle sizes were found 49.36 nm (nano-size). In vitro antifungal activity of synthesized compounds was evaluated against fungi Aspergillusniger, Aspergillusflavus,ColletotrichumfalcatumandIn vitro antibacterial activity was determined by screening the compounds against gram negative (P. aeruginosa, S.typhi) and gram positive (S. aureus and B.subtilis) bacterial strains using minimum inhibition concentration method (MIC) by serial dilution technique. The titanocene(IV) complexes have higher antimicrobial effect than the parent Schiff bases.

Ion–solvent interaction of tetraalkylammonium ions in solvents of high dielectric constant. Part I. Conductance and Walden product of tetraalkylammonium ions in N-methylacetamide at different temperatures

1968 ◽  
Vol 46 (22) ◽  
pp. 3525-3530 ◽  
Author(s):  
Raj Deo Singh ◽  
Pushti Prakash Rastogi ◽  
Ram Gopal
Keyword(s):  
Dielectric Constant ◽  
Aqueous Solutions ◽  
High Dielectric Constant ◽  
Electrical Conductance ◽  
Point Of View ◽  
Walden Product ◽  
Solvent Interaction ◽  
Tetraalkylammonium Ions ◽  
Different Temperatures ◽  
High Dielectric

Ion–solvent interaction of the tetraalkylammonium ions (R4N+) in N-methylacetamide has been studied from the point of view of electrical conductance and the derived Walden product. The results indicate R4N+ ions to be structure breakers in this solvent, quite opposite to their general behavior in aqueous solutions. The effect is conspicuous in the smaller Me4N+ and Et4N+ ions, but is less marked in the larger ions.

scholarly journals The Audio Frequency Conductance Study of Some Metal Succinate Salts in Aqueous Medium at Different Temperatures (Part I: Magnesium, Manganese (II), Barium and Copper Succinates)

2013 ◽  
Vol 2013 ◽  
pp. 1-10
Author(s):  
Kosrat N. Kaka ◽  
Anis A. Al-Najar ◽  
Wali M. Hamad
Keyword(s):  
Molar Conductance ◽  
Audio Frequency ◽  
Walden Product ◽  
Electrical Conductances ◽  
Conductance Data ◽  
Association Reaction ◽  
Different Temperatures ◽  
Quantitative Results ◽  
Strong Electrolytes ◽  
Modified Forms

The audio electrical conductances of aqueous solutions of magnesium, manganese II, barium, and copper succinates have been measured at various temperatures in the range of 298.15 K to 313.15 K, using an audio frequency conductance bridge. The evaluation of conductance data was carried out by minimisation technique using the theoretical equations of the complete and modified forms of Pitts (P) and Fuoss-Hsia (F-H), each a three-parameter equation, association constant (KA), molar conductance (Λm), and distance parameter (a). Quantitative results showed that these salts do not behave as “strong” electrolytes, and that their dissociations are far from complete. The abnormally low conductances of these electrolytes are not due to the presence of electrically neutral molecules but to the ion-pair formation. The Walden product values, as well as the standard thermodynamics functions (ΔH∘,ΔG∘,ΔS∘) for the association reaction at the four temperatures studied, have been evaluated.

scholarly journals Hydration Thermodynamics and Hydrodynamic (Stokes) Radius of the Lanthanide Ions

2020 ◽  
Vol 18 (46) ◽  
pp. 20-28
Author(s):  
Muhammed J. Kadhim ◽  
Maher Ibraheem Gamaj
Keyword(s):  
Diffusion Coefficient ◽  
Einstein Equation ◽  
Thermodynamic Parameters ◽  
Association Constant ◽  
Hydrodynamic Radius ◽  
Lanthanide Ions ◽  
Thermodynamic Quantities ◽  
Ion Hydration ◽  
Physiological Properties ◽  
Stokes Radius

Many biochemical and physiological properties depend on the size of ions and the thermodynamic quantities of ion hydration. The diffusion coefficient (D) of lanthanide (III) ions (Ln+3) in solution assumed (1.558-1.618 ×10−9 m2 s−1) by Einstein–Smoluchowski relation. The association constant (KA) of Ln+3 ions was calculated (210.3-215.3 dm3 mole-1) using the Shedlovsky method, and the hydrodynamic radius calculated (1.515-1.569 ×10−10 m) by the Stokes-Einstein equation. The thermodynamic parameters (ΔGo, ΔSo) also calculated by used suitable relations, while ΔHo, values are obtained from the literature. ΔGo, for ion hydration, has negative values in the range (13.25-13.30 KJ/mole), and a negative ΔSo, results have been shown in the limit (11.016-12.506 KJ/ K. mole).

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