AN ADIABATIC SOLUTION CALORIMETER USED FOR MEASURING THE MOLAR EXCESS ENTHALPY OF THE SYSTEM CARBON TETRACHLORIDE – BENZENE AT 25 °C

1965 ◽  
Vol 43 (7) ◽  
pp. 1912-1917 ◽  
Author(s):  
J. E. Bennett ◽  
G. C. Benson
Keyword(s):  
Carbon Tetrachloride ◽  
Excess Enthalpy ◽  
Adiabatic Calorimeter ◽  
Molar Excess ◽  
Heats Of Mixing ◽  
Maximum Value ◽  
Molar Excess Enthalpy ◽  
Continuous Record ◽  
Flexible Diaphragm ◽  
Solution Calorimeter

A new adiabatic calorimeter for measuring heats of mixing is described. The design of the mixing cell avoids the presence of a vapor space, and accommodates changes in volume by means of a flexible diaphragm. The apparatus is equipped with automatic adiabatic control and produces a continuous record of the temperature of the mixing cell. An extensive series of measurements was carried out for the system carbon tetrachloride – benzene at 25 °C. The maximum value of the molar excess enthalpy, 113.4 ± 0.5 J mole−1, occurred at a mole fraction of carbon tetrachloride equal to 0.4907. For most of the concentration range, the results are from 1 to 2 J mole−1 lower than data reported recently by other investigators.

scholarly journals Thermodynamic evidence for complex formation between carbon tetrachloride and triethylamine

1973 ◽  
Vol 26 (5) ◽  
pp. 1143 ◽  
Author(s):  
DV Fenby
Keyword(s):  
Carbon Tetrachloride ◽  
Complex Formation ◽  
Electron Acceptor ◽  
Excess Enthalpy ◽  
Molar Excess ◽  
Molar Excess Enthalpy

The molar excess enthalpy of the system carbon tetrachloride+ triethylamine has been measured at 298.15 K. The results are consistent with complex formation between the unlike molecules and provide further evidence for the electron acceptor ability of carbon tetrachloride.

The physical and thermodynamic properties of some associated solutions I. Dielectric constants and heats of mixing

1964 ◽  
Vol 277 (1370) ◽  
pp. 423-436 ◽  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Carbon Tetrachloride ◽  
Magnetic Resonance ◽  
Hydrogen Bonds ◽  
Excess Enthalpy ◽  
Liquid Mixtures ◽  
Dielectric Constants ◽  
Associated Solutions ◽  
Heats Of Mixing ◽  
Nuclear Magnetic Resonance Spectra

The dielectric constants of the liquid mixtures piperidine/tetrahydropyran, piperidine/cyclohexane, and tetrahydropyran/cyclohexane have been determined in the temperature range 20 to 60 °C. They have been used to evaluate kirkwood's g -factor for the last two systems, and for the tetrahydropyran/ cyclohexane system, dipoler contributions to the execss thermodynamic functions of mixing . which have also been calculated for the chloro form/carbon tetrachloride system. The heats of mixing of the above systems have been determined (at 20 °C) in order to compare the strengths of the various types of molecular interaction involved. All the mixtures are formed endothermally, suggesting that N — H . . .O hydrogen bonds formed in the first system are weaker than the N — H . . .N bonds solely present in the second, which has the largest excess enthalpy of the three systems. Nuclear magnetic resonance spectra have provided evidence of the formation of these hydrogen bonds.

Aromatic fluorocarbon mixtures. VI. Vapour pressures of carbon tetrachloride + hexafluorobenzene

1974 ◽  
Vol 27 (10) ◽  
pp. 2159 ◽  
Author(s):  
NF Pasco ◽  
DV Fenby
Keyword(s):  
Carbon Tetrachloride ◽  
Thermodynamic Properties ◽  
Equations Of State ◽  
Liquid Mixture ◽  
Excess Enthalpies ◽  
Molar Excess ◽  
Mixture Theories

Measurements are reported of the vapour pressures of the system carbon tetrachloride + hexafluorobenzene at 278.68 K. The molar excess Gibbs functions GE/M, obtained from these measurements have been combined with previously reported molar excess enthalpies to give GE/M at 298 K. Thermodynamic properties of CCl4+C6F6 at 298 K are compared with the predictions of liquid mixture theories based on analytic equations of state.

Sign in / Sign up

Export Citation Format

Share Document