Influence of Butyl Alcohol on Shape of Snow Crystals Formed in the Laboratory

Isothermal vapour-liquid equilibrium data at 65, 73 and 80 °C and isobaric ones at 101.3 kPa were measured in the tetrachloromethane-sec-butyl alcohol system. A modified circulation still of the Gillespie type was used for the measurements. Under the conditions of measurement, the system exhibits positive deviations from Raoult's law and minimum boiling-point azeotropes. The experimental data were fitted to a number of correlation equations, the most suitable being the Wilson equation.

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Thermodynamic and Kinetic Investigation of the Solvent Effect on the Oxidation of [Co(en)2SCH2COO]+ with S2O82- In Water-Methanol and Water-tert-Butyl Alcohol Mixtures

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19931001 ◽

1993 ◽

Vol 58 (5) ◽

pp. 1001-1006 ◽

Cited By ~ 1

Author(s):

Oľga Vollárová ◽

Ján Benko

Keyword(s):

Transfer Functions ◽

Activation Parameters ◽

Butyl Alcohol ◽

Oxidation Of Co ◽

Kinetics Of Oxidation ◽

Tert Butyl ◽

Tert Butyl Alcohol ◽

Alcohol Mixtures ◽

Kinetics Of

The kinetics of oxidation of [Co(en)2SCH2COO]+ with S2O82- was studied in water-methanol and water-tert-butyl alcohol mixtures. Changes in the reaction activation parameters ∆H≠ and ∆S≠ with varying concentration of the co-solvent depend on the kind of the latter, which points to a significant role of salvation effects. The solvation effect on the reaction is discussed based on a comparison of the transfer functions ∆Ht0, ∆St0 and ∆Gt0 for the initial and transition states with the changes in the activation parameters accompanying changes in the CO-solvent concentration. The transfer enthalpies of the reactant were obtained from calorimetric measurements.

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Solubility and Thermodynamic Transfer Functions of Cesium Dianilinetetraisothiocyanatochromate(III)

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19980293 ◽

1998 ◽

Vol 63 (3) ◽

pp. 293-298

Author(s):

Vladislav Holba

Keyword(s):

Experimental Data ◽

Isopropyl Alcohol ◽

Transfer Functions ◽

Butyl Alcohol ◽

Aqueous Methanol ◽

Gibbs Energies ◽

Gibbs Energy Of Transfer ◽

Energy Of Transfer ◽

The Given ◽

Reference Electrolyte

The solubilities of cesium dianilinetetraisothiocyanatochromate(III) in water as well as in aqueous methanol, isopropyl alcohol, tert-butyl alcohol and acetonitrile were measured as a function of temperature and solvent composition. The Gibbs energies, enthalpies and entropies of transfer of the salt from water to the given solvents have been evaluated from experimental data. The contribution of [Cr(C6H5NH2)2(NCS)4]- ion to the Gibbs energy of transfer of the investigated salt has been calculated using the tetraphenylarsonium tetraphenylborate (TATB) reference electrolyte assumption.

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Activity Coefficients and Gibbs Energies of Transfer of Tetraalkylammonium Dianilinetetraisothiocyanatochromates(III)

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19941738 ◽

1994 ◽

Vol 59 (8) ◽

pp. 1738-1744

Author(s):

Vladislav Holba

Keyword(s):

Activity Coefficients ◽

Transfer Functions ◽

Butyl Alcohol ◽

Methyl Ethyl ◽

Tetraalkylammonium Ions ◽

Ionic Transfer ◽

Gibbs Energies ◽

Gibbs Energies Of Transfer ◽

Acetonitrile Solutions ◽

Mixed Systems

The solubilities of tetraalkylammonium dianilinetetraisothiocyanatochromates(III) (alkyl = methyl, ethyl, 1-propyl, and 1-butyl) in water, water - methanol, water - tert-butyl alcohol and water - acetonitrile solutions were measured at 25 °C. The results were used to evaluate the activity coefficients and Gibbs energies of transfer of the saturating salts from water to the mixed systems. The Gibbs energies of transfer of the [Cr(C6H5NH2)2(NCS)4]- ion were obtained by means of known ionic transfer functions for the tetraalkylammonium ions based on the TATB assumption.

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