The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform
M. V. Prabhakara Rao - One of the best experts on this subject based on the ideXlab platform.
-
Excess molar enthalpies of dimethylsulfoxide with chloroethanes and chloroethenes at 298.15 K
Thermochimica Acta, 2007Co-Authors: M. Radhamma, M. V. Prabhakara Rao, Wei-chen Liao, Pannur Venkatesu, Ming-jer Lee, Ho-mu LinAbstract:Abstract Excess molar enthalpies ( H M E ) at 298.15 K and ambient pressure have been measured as a function of composition for the binary liquid mixtures of dimethylsulfoxide (DMSO) with chloroethanes and chloroethenes. The chloroethanes include 1,2-dichloroethane, 1,1,1-trichloroethane and 1,1,2,2-Tetrachloroethane and the chloroethenes are trichloroethene and tetrachloroethene. The H M E values for the above mixtures have been measured by a Paar 1451 solution calorimeter and are negative over the whole range of composition in all the binary mixtures except in the binary system of DMSO with tetrachloroethene, whereas the H M E is positive over the entire range of composition. The experimental results have been correlated using the Redlich–Kister (R–K) polynomials and the results are interpreted on the basis of possible hydrogen bonding between unlike molecules and changes in molecular association equilibria as well as structural effects for these systems. The excess molar enthalpy data have also been correlated with the Peng–Robinson (PR) as well as the Patel–Teja (PT) equations of state (EOS) and also the activity coefficient models of the Wilson and the NRTL.
-
Vapor−Liquid Equilibria and Excess Molar Enthalpies for N-Methyl-2-pyrrolidone with Chloroethanes and Chloroethenes
Journal of Chemical & Engineering Data, 2003Co-Authors: P. Gnanakumari, M. V. Prabhakara Rao, And D. H. L. Prasad, Y. V. L. Ravi KumarAbstract:Precise temperature−composition (T−x) data and excess molar enthalpies ( ) of binary mixtures of N-methyl-2-pyrrolidone (NMP) with chloroethanes and ethenes were measured by using an ebulliometer and a solution calorimeter. The chloroethanes are 1,2-dichloroethane, 1,1,1-trichloroethane, and 1,1,2,2-Tetrachloroethane. The chloroethenes are trichloroethene and tetrachloroethene. The T−x data were used to compute vapor-phase composition and activity coefficients with the Wilson model. The experimental ( ) values are negative for four binary systems over the entire range of composition. An inversion in sign from negative to positive for the system N-methyl-2-pyrrolidone + tetrachloroethene was observed.
-
Excess volumes and speeds of sound of N-methyl-2-pyrrolidone with chloroethanes and chloroethenes at 303.15 K
Journal of Chemical & Engineering Data, 2002Co-Authors: P. Gnana Kumari, M. Radhamma, G. C. Sekhar, M. V. Prabhakara RaoAbstract:Excess molar volumes (V E ) and the speed of sound (u) of binary mixtures of N-methyl-2-pyrrolidone with chloroethanes and ethenes have been measured at 303.15 K. The chloroethanes are 1,2-dichloroethane, 1,1,1-trichloroethane, and 1,1,2,2-Tetrachloroethane. The chloroethenes are trichloroethene and tetrachloroethene. The speed of sound data were used to compute isentropic compressibilities (κ s ) and excess isentropic compressibilities (κ s E ). V E values are negative over the entire mole fraction range. The K, values are negative over the whole volume fraction range for the systems ofN-methyl-2-pyrrolidone with 1,1,1-trichloroethane, 1,1,2,2-Tetrachloroethane, and tetrachloroethene and positive for the systems of N-methyl-2-pyrrolidone with 1,2-dichloroethane and trichloroethene.
-
Excess Molar Volumes and Speeds of Sound of N,N-Dimethylacetamide with Chloroethanes and Chloroethenes at 303.15 K
Journal of Chemical & Engineering Data, 2001Co-Authors: G. C. Sekhar, And P. Venkatesu, M. V. Prabhakara RaoAbstract:Excess molar volumes (VE) and speeds of sound (u) of the binary liquid mixtures of N,N-dimethylacetamide (DMA) with chloroethanes and chloroethenes at 303.15 K have been measured over the entire range of compositions. The chloroethanes are 1,2-dichloroethane, 1,1,1-trichloroethane, and 1,1,2,2-Tetrachloroethane, and the chloroethenes are trichloroethene and tetrachloroethene. The VE values are positive in mixtures of N,N-dimethylacetamide with 1,2-dichloroethane and tetrachloroethene. The VE values are negative over the whole mole fraction range for N,N-dimethylacetamide with 1,1,1-trichloroethane, 1,1,2,2-Tetrachloroethane, and trichloroethene. The speed of sound data were used to compute isentropic compressibilities (κs) and excess isentropic compressibilities ( ). The values are positive for the system N,N-dimethylacetamide with 1,2-dichloroethane. For the remaining systems, the values are negative over the entire range of compositions.
-
Excess volumes of 1,1,2,2-Tetrachloroethane or tetrachloroethene + 2-chlorotoluene, + 3-chlorotoluene, and + 4-chlorotoluene at 303.15 and 313.15 K
Journal of Chemical & Engineering Data, 1995Co-Authors: B. Busa Goud, P. Venkatesu, M. V. Prabhakara RaoAbstract:Excess volumes, V{sup E}, have been determined for 1,1,2,2-Tetrachloroethane or tetrachloroethene + 2-chlorotoluene, + 3-chlorotoluene, and + 4-chlorotoluene at 303.15 and 313.15 K The VE values are found to be positive for 1,1,2,2-Tetrachloroethane + 2-chlorotoluene, + 3-chlorotoluene, and + 4-chlorotoluene at both temperatures and are negative for tetrachloroethene + 2-chlorotoluene, + 3-chlorotoluene, and + 4-chlorotoluene at both temperatures except for tetrachloroethene + 3-chlorotoluene which shows positive V{sup E} values at 303.15 K.
Satyanarayana Nallani - One of the best experts on this subject based on the ideXlab platform.
-
excess molar volumes and sound speed in phenylacetonitrile 1 2 dichloroethane phenylacetonitrile 1 1 2 trichloroethane phenylacetonitrile 1 1 2 2 Tetrachloroethane phenylacetonitrile trichloroethene and phenylacetonitrile tetrachloroethene at tempera
Journal of Chemical & Engineering Data, 2010Co-Authors: Asra Banu Syeda, Amara Jyothi Koppula, Sathyanarayana Boodida, Satyanarayana NallaniAbstract:The present paper reports the experimental data for density ρ, viscosity η, and speed of sound u in (phenylacetonitrile + 1,2-dichloroethane), (phenylacetonitrile + 1,1,2-trichloroethane), (phenylacetonitrile + 1,1,2,2-Tetrachloroethane), (phenylacetonitrile + trichloroethene), and (phenylacetonitrile + tetrachloroethene) over the entire range of composition at T = (303.15 to 313.15) K. These values have been used to calculate the excess molar volumes VE and deviation in isentropic compressibility Δκs. The excess molar volumes and deviation in isentropic compressibility are fitted to a Redlich−Kister-type equation to derive binary coefficients and standard deviation and to elicit the specific interactions like complex formation as well as the saturation of chlorine atoms with π electrons.
-
Excess Molar Volumes and Sound Speed in (Phenylacetonitrile + 1,2-Dichloroethane), (Phenylacetonitrile + 1,1,2-Trichloroethane), (Phenylacetonitrile + 1,1,2,2-Tetrachloroethane), (Phenylacetonitrile + Trichloroethene), and (Phenylacetonitrile + Tetra
Journal of Chemical & Engineering Data, 2010Co-Authors: Asra Banu Syeda, Amara Jyothi Koppula, Sathyanarayana Boodida, Satyanarayana NallaniAbstract:The present paper reports the experimental data for density ρ, viscosity η, and speed of sound u in (phenylacetonitrile + 1,2-dichloroethane), (phenylacetonitrile + 1,1,2-trichloroethane), (phenylacetonitrile + 1,1,2,2-Tetrachloroethane), (phenylacetonitrile + trichloroethene), and (phenylacetonitrile + tetrachloroethene) over the entire range of composition at T = (303.15 to 313.15) K. These values have been used to calculate the excess molar volumes VE and deviation in isentropic compressibility Δκs. The excess molar volumes and deviation in isentropic compressibility are fitted to a Redlich−Kister-type equation to derive binary coefficients and standard deviation and to elicit the specific interactions like complex formation as well as the saturation of chlorine atoms with π electrons.
D.m.t Newsham - One of the best experts on this subject based on the ideXlab platform.
-
isobaric vapour liquid equilibria for mixtures containing halogenated hydrocarbons at atmospheric pressure i binary mixtures of trichloromethane 1 2 dichloroethane 1 2 dichloroethane 1 1 2 2 Tetrachloroethane trichloromethane 1 1 2 2 tetrachloroethan
Fluid Phase Equilibria, 1999Co-Authors: M N M Alhayan, D.m.t NewshamAbstract:Abstract Vapour–liquid equilibria at atmospheric pressure for mixtures of trichloromethane+1,2-dichloroethane, 1,2-dichloroethane+1,1,2,2-Tetrachloroethane, trichloromethane+1,1,2,2-Tetrachloroethane and n-heptane+1,1,2,2-Tetrachloroethane have been determined. These have been shown to be thermodynamically consistent.
-
Isobaric vapour–liquid equilibria for mixtures containing halogenated hydrocarbons at atmospheric pressure: I. Binary mixtures of trichloromethane+1,2-dichloroethane, 1,2-dichloroethane+1,1,2,2-Tetrachloroethane, trichloromethane+1,1,2,2-tetrachloroe
Fluid Phase Equilibria, 1999Co-Authors: M.n.m Al-hayan, D.m.t NewshamAbstract:Abstract Vapour–liquid equilibria at atmospheric pressure for mixtures of trichloromethane+1,2-dichloroethane, 1,2-dichloroethane+1,1,2,2-Tetrachloroethane, trichloromethane+1,1,2,2-Tetrachloroethane and n-heptane+1,1,2,2-Tetrachloroethane have been determined. These have been shown to be thermodynamically consistent.
Mariano Gracia - One of the best experts on this subject based on the ideXlab platform.
-
isothermal vapour liquid equilibrium for binary mixtures of tetrahydrofuran 1 1 2 2 Tetrachloroethane or tetrachloroethene at nine temperatures
The Journal of Chemical Thermodynamics, 2006Co-Authors: Rosa Garriga, P. Pérez, Mariano GraciaAbstract:Abstract Vapour pressures of (tetrahydrofuran + 1,1,2,2-Tetrachloroethane, or tetrachloroethene) at nine temperatures between T = 283.15 K and T = 323.15 K were measured by a static method. The reduction of the vapour pressures data to obtain activity coefficients and excess molar Gibbs energies was carried out by fitting the vapour pressure data to the Redlich–Kister polynomial according to Barker’s method. Excess molar volumes were also measured at T = 298.15 K. A comparative analysis about the thermodynamic behaviour of both systems is performed, in terms of hydrogen bonding and electron-donor–acceptor interactions, as well as the resonance effect in tetrachloroethene.
-
Isothermal (vapour + liquid) equilibrium for binary mixtures of (tetrahydrofuran + 1,1,2,2-Tetrachloroethane or tetrachloroethene) at nine temperatures
The Journal of Chemical Thermodynamics, 2006Co-Authors: Rosa Garriga, P. Pérez, Mariano GraciaAbstract:Abstract Vapour pressures of (tetrahydrofuran + 1,1,2,2-Tetrachloroethane, or tetrachloroethene) at nine temperatures between T = 283.15 K and T = 323.15 K were measured by a static method. The reduction of the vapour pressures data to obtain activity coefficients and excess molar Gibbs energies was carried out by fitting the vapour pressure data to the Redlich–Kister polynomial according to Barker’s method. Excess molar volumes were also measured at T = 298.15 K. A comparative analysis about the thermodynamic behaviour of both systems is performed, in terms of hydrogen bonding and electron-donor–acceptor interactions, as well as the resonance effect in tetrachloroethene.
Asra Banu Syeda - One of the best experts on this subject based on the ideXlab platform.
-
excess molar volumes and sound speed in phenylacetonitrile 1 2 dichloroethane phenylacetonitrile 1 1 2 trichloroethane phenylacetonitrile 1 1 2 2 Tetrachloroethane phenylacetonitrile trichloroethene and phenylacetonitrile tetrachloroethene at tempera
Journal of Chemical & Engineering Data, 2010Co-Authors: Asra Banu Syeda, Amara Jyothi Koppula, Sathyanarayana Boodida, Satyanarayana NallaniAbstract:The present paper reports the experimental data for density ρ, viscosity η, and speed of sound u in (phenylacetonitrile + 1,2-dichloroethane), (phenylacetonitrile + 1,1,2-trichloroethane), (phenylacetonitrile + 1,1,2,2-Tetrachloroethane), (phenylacetonitrile + trichloroethene), and (phenylacetonitrile + tetrachloroethene) over the entire range of composition at T = (303.15 to 313.15) K. These values have been used to calculate the excess molar volumes VE and deviation in isentropic compressibility Δκs. The excess molar volumes and deviation in isentropic compressibility are fitted to a Redlich−Kister-type equation to derive binary coefficients and standard deviation and to elicit the specific interactions like complex formation as well as the saturation of chlorine atoms with π electrons.
-
Excess Molar Volumes and Sound Speed in (Phenylacetonitrile + 1,2-Dichloroethane), (Phenylacetonitrile + 1,1,2-Trichloroethane), (Phenylacetonitrile + 1,1,2,2-Tetrachloroethane), (Phenylacetonitrile + Trichloroethene), and (Phenylacetonitrile + Tetra
Journal of Chemical & Engineering Data, 2010Co-Authors: Asra Banu Syeda, Amara Jyothi Koppula, Sathyanarayana Boodida, Satyanarayana NallaniAbstract:The present paper reports the experimental data for density ρ, viscosity η, and speed of sound u in (phenylacetonitrile + 1,2-dichloroethane), (phenylacetonitrile + 1,1,2-trichloroethane), (phenylacetonitrile + 1,1,2,2-Tetrachloroethane), (phenylacetonitrile + trichloroethene), and (phenylacetonitrile + tetrachloroethene) over the entire range of composition at T = (303.15 to 313.15) K. These values have been used to calculate the excess molar volumes VE and deviation in isentropic compressibility Δκs. The excess molar volumes and deviation in isentropic compressibility are fitted to a Redlich−Kister-type equation to derive binary coefficients and standard deviation and to elicit the specific interactions like complex formation as well as the saturation of chlorine atoms with π electrons.
