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Luciana I.n. Tomé - One of the best experts on this subject based on the ideXlab platform.

  • Enthalpy of sublimation/Vaporization of trans-cyclohexyl-1,4-diamine and cis-cyclohexyl-1,2-diamine
    The Journal of Chemical Thermodynamics, 2007
    Co-Authors: Luciana I.n. Tomé, Sandra C. C. Nunes, João Canotilho, Teresa M. R. Maria, Mário T. S. Rosado, M. Ermelinda S. Eusébio
    Abstract:

    Abstract The molar Enthalpy of sublimation, Δ cr g H m ∘ , of trans-cyclohexyl-1,4-diamine and the molar Enthalpy of Vaporization, Δ l g H m ∘ , of cis-cyclohexyl-1,2-diamine, at the temperature 298.15 K, were determined by calorimetry. Δ cr g H m ∘ ( T = 298.15 K ) = ( 105.0 ± 0.8 ) kJ · mol - 1 was obtained for the trans-isomer and Δ l g H m ∘ ( T = 298.15 K ) = ( 62.2 ± 1.0 ) kJ · mol - 1 for the cis form. The molar Enthalpy of fusion of the first compound, at T = 342.1 K, was determined by differential scanning calorimetry. The molar Enthalpy of Vaporization of the 1,4-isomer was estimated by combining the value of the Enthalpy of sublimation with that of the Enthalpy of fusion. The values obtained for molar standard Enthalpy of Vaporization and those available for the Enthalpy of the diamines in the gas state were used to calculate the difference between the enthalpies of both compounds in the liquid state.

  • Enthalpy of sublimation Vaporization of trans cyclohexyl 1 4 diamine and cis cyclohexyl 1 2 diamine
    The Journal of Chemical Thermodynamics, 2007
    Co-Authors: Luciana I.n. Tomé, Sandra C. C. Nunes, João Canotilho, Teresa M. R. Maria, Mário T. S. Rosado, Ermelinda M S Eusebio
    Abstract:

    Abstract The molar Enthalpy of sublimation, Δ cr g H m ∘ , of trans-cyclohexyl-1,4-diamine and the molar Enthalpy of Vaporization, Δ l g H m ∘ , of cis-cyclohexyl-1,2-diamine, at the temperature 298.15 K, were determined by calorimetry. Δ cr g H m ∘ ( T = 298.15 K ) = ( 105.0 ± 0.8 ) kJ · mol - 1 was obtained for the trans-isomer and Δ l g H m ∘ ( T = 298.15 K ) = ( 62.2 ± 1.0 ) kJ · mol - 1 for the cis form. The molar Enthalpy of fusion of the first compound, at T = 342.1 K, was determined by differential scanning calorimetry. The molar Enthalpy of Vaporization of the 1,4-isomer was estimated by combining the value of the Enthalpy of sublimation with that of the Enthalpy of fusion. The values obtained for molar standard Enthalpy of Vaporization and those available for the Enthalpy of the diamines in the gas state were used to calculate the difference between the enthalpies of both compounds in the liquid state.

Sergey P Verevkin - One of the best experts on this subject based on the ideXlab platform.

  • Vapor pressure and Enthalpy of Vaporization of aliphatic propanediamines
    The Journal of Chemical Thermodynamics, 2012
    Co-Authors: Sergey P Verevkin, Yury Chernyak
    Abstract:

    Abstract Vapor pressures of four aliphatic propanediamines including N-methyl-1,3-propanediamine (MPDA), N,N-dimethyl-1,3-propanediamine (DMPDA), N,N-diethyl-1,3-propanediamine (DEPDA) and N,N,N′,N′-tetramethyl-1,3-propanediamine (4MPDA) were measured using the transpiration method. The vapor pressures developed in this work and reported in the literature were used to derive molar Enthalpy of Vaporization values at the reference temperature 298.15 K. An internal consistency check of the Enthalpy of Vaporization was performed for the aliphatic propanediamines studied in this work. A group-contribution method was developed for the validation and prediction Vaporization enthalpies of amines and diamines.

  • Vapor pressure and Enthalpy of Vaporization of linear aliphatic alkanediamines
    The Journal of Chemical Thermodynamics, 2011
    Co-Authors: Vasiliy A. Pozdeev, Sergey P Verevkin
    Abstract:

    Vapor pressures and the molar enthalpies of Vaporization of the linear aliphatic alkanediamines H 2 N–(CH 2 ) n –NH 2 with n  = (3 to 12) have been determined using the transpiration method. A linear correlation of enthalpies of Vaporization (at T  = 298.15 K) of the alkanediamines with the number n and with the Kovat’s indices has been found, proving the internal consistency of the measured data.

  • Vapour pressure and Enthalpy of Vaporization of aliphatic poly-amines
    The Journal of Chemical Thermodynamics, 2010
    Co-Authors: Anastasia A. Efimova, Sergey P Verevkin, Vladimir N. Emel’yanenko, Yury Chernyak
    Abstract:

    Abstract Molar enthalpies of Vaporization of aliphatic poly-amines: 1,4-dimethylpiperazine [106-58-1], 1-(2-aminoethyl)-piperazine, [140-31-8], 1-(2-aminoethyl)-4-methyl-piperazine [934-98-5], and triethylenetetramine [112-24-3] were obtained from the temperature dependence of the vapour pressure measured by the transpiration method. A large number of the primary experimental results on temperature dependences of vapour pressures of the parent compounds have been collected from the literature and have been treated uniformly in order to derive Vaporization enthalpies of poly-amines at the reference temperature 298.15 K. An internal consistency check was performed on Enthalpy of Vaporization values for poly-amines studied in this work.

  • Vapour pressure and Enthalpy of Vaporization of cyclic alkylene carbonates
    Fluid Phase Equilibria, 2008
    Co-Authors: Sergey P Verevkin, Yury Chernyak, Benjamin Schäffner, Alexey V. Toktonov, Armin Börner
    Abstract:

    Abstract Molar enthalpies of Vaporization of cyclic alkyl carbonates: ethylene carbonate, propylene carbonate, butylene carbonate, and glycerine carbonate were obtained from the temperature dependence of the vapour pressure measured by the transpiration method. A large number of the primary experimental results on temperature dependences of vapour pressures have been collected from the literature and have been treated uniformly in order to derive Vaporization enthalpies of alkylene carbonates at the reference temperature 298.15 K. This collection together with the new experimental results has been used for the selection of the reliable data sets for each compound under study. Experimental vapour pressure data from various literature sources were reviewed and regressed together with data developed in this work. The resulting correlations for vapour pressure of cyclic alkylene carbonates are recommended for use over a temperature range from ambient to the normal boiling point. Consequently, these correlations were used to derive recommended molar Enthalpy of Vaporization values at 298.15 K.

  • Vapour pressure and Enthalpy of Vaporization of aliphatic dialkyl carbonates
    The Journal of Chemical Thermodynamics, 2008
    Co-Authors: Svetlana A. Kozlova, Sergey P Verevkin, Yury Chernyak, Vladimir N. Emel’yanenko, Miglena Georgieva, Benjamin Schäffner, Armin Börner
    Abstract:

    Abstract Molar enthalpies of Vaporization of aliphatic alkyl carbonates: dimethyl carbonate [616-38-6], diethyl carbonate [105-58-8], di-n-propyl carbonate [623-96-1], di-n-butyl carbonate [542-52-9], and dibenzyl carbonate [3459-92-5] were obtained from the temperature dependence of the vapour pressure measured by the transpiration method. A large number of the primary experimental results on temperature dependences of vapour pressures have been collected from the literature and have been treated uniformly in order to derive Vaporization enthalpies of dialkyl carbonates at the reference temperature 298.15 K. An internal consistency check was performed on Enthalpy of Vaporization values for dialkyl carbonates studied in this work.

M. Ermelinda S. Eusébio - One of the best experts on this subject based on the ideXlab platform.

  • Enthalpy of sublimation/Vaporization of trans-cyclohexyl-1,4-diamine and cis-cyclohexyl-1,2-diamine
    The Journal of Chemical Thermodynamics, 2007
    Co-Authors: Luciana I.n. Tomé, Sandra C. C. Nunes, João Canotilho, Teresa M. R. Maria, Mário T. S. Rosado, M. Ermelinda S. Eusébio
    Abstract:

    Abstract The molar Enthalpy of sublimation, Δ cr g H m ∘ , of trans-cyclohexyl-1,4-diamine and the molar Enthalpy of Vaporization, Δ l g H m ∘ , of cis-cyclohexyl-1,2-diamine, at the temperature 298.15 K, were determined by calorimetry. Δ cr g H m ∘ ( T = 298.15 K ) = ( 105.0 ± 0.8 ) kJ · mol - 1 was obtained for the trans-isomer and Δ l g H m ∘ ( T = 298.15 K ) = ( 62.2 ± 1.0 ) kJ · mol - 1 for the cis form. The molar Enthalpy of fusion of the first compound, at T = 342.1 K, was determined by differential scanning calorimetry. The molar Enthalpy of Vaporization of the 1,4-isomer was estimated by combining the value of the Enthalpy of sublimation with that of the Enthalpy of fusion. The values obtained for molar standard Enthalpy of Vaporization and those available for the Enthalpy of the diamines in the gas state were used to calculate the difference between the enthalpies of both compounds in the liquid state.

Ermelinda M S Eusebio - One of the best experts on this subject based on the ideXlab platform.

  • Enthalpy of sublimation Vaporization of trans cyclohexyl 1 4 diamine and cis cyclohexyl 1 2 diamine
    The Journal of Chemical Thermodynamics, 2007
    Co-Authors: Luciana I.n. Tomé, Sandra C. C. Nunes, João Canotilho, Teresa M. R. Maria, Mário T. S. Rosado, Ermelinda M S Eusebio
    Abstract:

    Abstract The molar Enthalpy of sublimation, Δ cr g H m ∘ , of trans-cyclohexyl-1,4-diamine and the molar Enthalpy of Vaporization, Δ l g H m ∘ , of cis-cyclohexyl-1,2-diamine, at the temperature 298.15 K, were determined by calorimetry. Δ cr g H m ∘ ( T = 298.15 K ) = ( 105.0 ± 0.8 ) kJ · mol - 1 was obtained for the trans-isomer and Δ l g H m ∘ ( T = 298.15 K ) = ( 62.2 ± 1.0 ) kJ · mol - 1 for the cis form. The molar Enthalpy of fusion of the first compound, at T = 342.1 K, was determined by differential scanning calorimetry. The molar Enthalpy of Vaporization of the 1,4-isomer was estimated by combining the value of the Enthalpy of sublimation with that of the Enthalpy of fusion. The values obtained for molar standard Enthalpy of Vaporization and those available for the Enthalpy of the diamines in the gas state were used to calculate the difference between the enthalpies of both compounds in the liquid state.

Mário T. S. Rosado - One of the best experts on this subject based on the ideXlab platform.

  • Enthalpy of sublimation/Vaporization of trans-cyclohexyl-1,4-diamine and cis-cyclohexyl-1,2-diamine
    The Journal of Chemical Thermodynamics, 2007
    Co-Authors: Luciana I.n. Tomé, Sandra C. C. Nunes, João Canotilho, Teresa M. R. Maria, Mário T. S. Rosado, M. Ermelinda S. Eusébio
    Abstract:

    Abstract The molar Enthalpy of sublimation, Δ cr g H m ∘ , of trans-cyclohexyl-1,4-diamine and the molar Enthalpy of Vaporization, Δ l g H m ∘ , of cis-cyclohexyl-1,2-diamine, at the temperature 298.15 K, were determined by calorimetry. Δ cr g H m ∘ ( T = 298.15 K ) = ( 105.0 ± 0.8 ) kJ · mol - 1 was obtained for the trans-isomer and Δ l g H m ∘ ( T = 298.15 K ) = ( 62.2 ± 1.0 ) kJ · mol - 1 for the cis form. The molar Enthalpy of fusion of the first compound, at T = 342.1 K, was determined by differential scanning calorimetry. The molar Enthalpy of Vaporization of the 1,4-isomer was estimated by combining the value of the Enthalpy of sublimation with that of the Enthalpy of fusion. The values obtained for molar standard Enthalpy of Vaporization and those available for the Enthalpy of the diamines in the gas state were used to calculate the difference between the enthalpies of both compounds in the liquid state.

  • Enthalpy of sublimation Vaporization of trans cyclohexyl 1 4 diamine and cis cyclohexyl 1 2 diamine
    The Journal of Chemical Thermodynamics, 2007
    Co-Authors: Luciana I.n. Tomé, Sandra C. C. Nunes, João Canotilho, Teresa M. R. Maria, Mário T. S. Rosado, Ermelinda M S Eusebio
    Abstract:

    Abstract The molar Enthalpy of sublimation, Δ cr g H m ∘ , of trans-cyclohexyl-1,4-diamine and the molar Enthalpy of Vaporization, Δ l g H m ∘ , of cis-cyclohexyl-1,2-diamine, at the temperature 298.15 K, were determined by calorimetry. Δ cr g H m ∘ ( T = 298.15 K ) = ( 105.0 ± 0.8 ) kJ · mol - 1 was obtained for the trans-isomer and Δ l g H m ∘ ( T = 298.15 K ) = ( 62.2 ± 1.0 ) kJ · mol - 1 for the cis form. The molar Enthalpy of fusion of the first compound, at T = 342.1 K, was determined by differential scanning calorimetry. The molar Enthalpy of Vaporization of the 1,4-isomer was estimated by combining the value of the Enthalpy of sublimation with that of the Enthalpy of fusion. The values obtained for molar standard Enthalpy of Vaporization and those available for the Enthalpy of the diamines in the gas state were used to calculate the difference between the enthalpies of both compounds in the liquid state.