Standard molar enthalpies of formation of some vinylfuran derivatives

The standard (p^° = 0.1 MPa) molar enthalpies of combustion, ${\mathrm{\Delta }}_{\text{c}}{H}_{\text{m}}^{°}$, for crystalline 2-furanacrylic acid, 3-furanacrylic acid, and 3-(2-furyl)-2-propenal and for the liquid 2-furanacrylonitrile were determined, at the temperature 298.15 K, using a static bomb combustion calorimeter. For these compounds, the standard molar enthalpies of phase transition, ${\mathrm{\Delta }}_{\text{cr,l}}^{\text{g}}{H}_{\text{m}}^{°}$, at T = 298.15 K, were determined by Calvet microcalorimetry. For the two crystalline furanacrylic acids the vapour pressures as function of temperature were measured by the Knudsen effusion technique and the standard molar enthalpies of sublimation, ${\mathrm{\Delta }}_{\text{cr}}^{\text{g}}{H}_{\text{m}}^{°}$, at T = 298.15 K were derived by the Clausius–Clapeyron equation. The results are as follows:     

11.

Experimental and computational study of the energetics of 5- and 6-aminoindazole     

Manuel A.V. Ribeiro da Silva  Joana I.T.A. Cabral  Álvaro Cimas 《The Journal of chemical thermodynamics》2010,42(10):1240-1247

     

12.

Standard molar enthalpies of formation of the three isomers of chloroanisole     

Manuel A.V. Ribeiro da Silva  Ana I.M.C. Lobo Ferreira 《The Journal of chemical thermodynamics》2008,40(3):362-368

     

13.

Thermochemistry of substituted thiophenecarbonitrile derivatives     

Manuel A.V. Ribeiro da Silva  Ana Filipa L.O.M. Santos 《The Journal of chemical thermodynamics》2008,40(2):225-231

     

14.

Enthalpies of combustion and formation of α-d-glucoheptono-1,4-lactone and α,β-glucooctanoic-1,4-lactone     

Patricia Amador  Marian Y. Mata  Henoc Flores 《The Journal of chemical thermodynamics》2008,40(5):901-905

     

15.

Experimental and computational thermochemical study of the tri-, tetra-, and pentachloronitrobenzene isomers     

Manuel A.V. Ribeiro da Silva  Ana I.M.C. Lobo Ferreira  Joana I.T.A. Cabral  Ana Filipa L.O.M. Santos  Ana Rita G. Moreno  Tiago L.P. Galvão  Inês M. Rocha  Paula M.V. Fernandes  Sílvia Q. Salgueiro  Vanessa A.F. de Moura  Isabel M.S.C. Oliveira  Paula C. Cotelo  Mariana R.A. Ribeiro 《The Journal of chemical thermodynamics》2009,41(9):984-991

     

16.

Calorimetric and computational thermochemical study of difluorophenol isomers     

Manuel A.V. Ribeiro da Silva  Ana I.M.C. Lobo Ferreira 《The Journal of chemical thermodynamics》2010,42(2):182-188

     

17.

Partial molar volumes of organic solutes in water. XX. Glycine(aq) and l-alanine(aq) at temperatures (298 to 443) K and at pressures up to 30 MPa     

Ivan Cibulka  Lubomír Hnědkovský  Josef Šedlbauer 《The Journal of chemical thermodynamics》2010,42(2):198-207

Density data for dilute aqueous solutions of two amino acids (glycine, l-alanine) obtained using a flow vibrating-tube densimeter are presented together with partial molar volumes at infinite dilution (standard molar volumes, $V_{\text{m,}2}^{°}$) calculated from the measured data. The experiments were performed at temperatures from (298 up to 443) K at pressures close to the saturation line of water, at pressures in the range from (15 to 17) MPa, and at 30 MPa. Values of an analogue of isothermal compressibility, ${\kappa }_{T\text{,}2}^{°}=-(1/V_{\text{m,}2}^{°})(?V_{\text{m,}2}^{°}/?p{)}_T$, are also evaluated. Maxima on the curves $V_{\text{m,}2}^{°}(T)$ and ${\kappa }_{T\text{,}2}^{°}(T)$ are observed and discussed. The new data along with literature values of standard molar volumes and heat capacities are used for generating the recommended parameterization of an equation of state for standard molar thermodynamic properties of the aqueous amino acids.     

18.

Experimental standard molar enthalpies of formation of some 4-alkoxybenzoic acids     

Manuel A.V. Ribeiro da Silva  Ana I.M.C. Lobo Ferreira  Fabrice M. Maciel 《The Journal of chemical thermodynamics》2010,42(2):220-224

The present work is part of a research program on the energetics of the linear 4-n-alkoxybenzoic acids, aiming the study of the enthalpic effect of the introduction of an alkoxy chain in the position 4- of the benzoic acid ring. In this work, we present the results of the thermochemical research on 4-n-alkoxybenzoic acids with the alkoxy chain length n = 2, 4, and 8.The standard ($p^{°}=0.1\text{MPa}$) molar enthalpy of formation of crystalline 4-ethoxybenzoic acid, 4-butoxybenzoic acid, and 4-(octyloxy)benzoic acid was measured, at T = 298.15 K, by static-bomb calorimetry. These values, combined with the values of standard molar enthalpies of sublimation, were used to derive the standard molar enthalpies of formation in the gaseous phase.

Partial molar volumes of organic solutes in water. XX. Glycine(aq) and l-alanine(aq) at temperatures (298 to 443) K and at pressures up to 30 MPa

Density data for dilute aqueous solutions of two amino acids (glycine, l-alanine) obtained using a flow vibrating-tube densimeter are presented together with partial molar volumes at infinite dilution (standard molar volumes, $V_{\text{m,}2}^{°}$) calculated from the measured data. The experiments were performed at temperatures from (298 up to 443) K at pressures close to the saturation line of water, at pressures in the range from (15 to 17) MPa, and at 30 MPa. Values of an analogue of isothermal compressibility, ${\kappa }_{T\text{,}2}^{°}=-(1/V_{\text{m,}2}^{°})(?V_{\text{m,}2}^{°}/?p{)}_T$, are also evaluated. Maxima on the curves $V_{\text{m,}2}^{°}(T)$ and ${\kappa }_{T\text{,}2}^{°}(T)$ are observed and discussed. The new data along with literature values of standard molar volumes and heat capacities are used for generating the recommended parameterization of an equation of state for standard molar thermodynamic properties of the aqueous amino acids.     

Experimental standard molar enthalpies of formation of some 4-alkoxybenzoic acids

The present work is part of a research program on the energetics of the linear 4-n-alkoxybenzoic acids, aiming the study of the enthalpic effect of the introduction of an alkoxy chain in the position 4- of the benzoic acid ring. In this work, we present the results of the thermochemical research on 4-n-alkoxybenzoic acids with the alkoxy chain length n = 2, 4, and 8.The standard ($p^{°}=0.1\text{MPa}$) molar enthalpy of formation of crystalline 4-ethoxybenzoic acid, 4-butoxybenzoic acid, and 4-(octyloxy)benzoic acid was measured, at T = 298.15 K, by static-bomb calorimetry. These values, combined with the values of standard molar enthalpies of sublimation, were used to derive the standard molar enthalpies of formation in the gaseous phase.