Iodine Complexes in Inert Solvents. III. Iodine Complexes with Methanol, Ethanol, or Diethyl Ether in Carbon Tetrachloride

1957 ◽  
Vol 26 (5) ◽  
pp. 1192-1199 ◽  
Author(s):  
P. A. D. de Maine
Keyword(s):  
Carbon Tetrachloride ◽  
Diethyl Ether ◽  
Iodine Complexes

THE DENSITY OF ADSORBATES

1948 ◽  
Vol 26b (1) ◽  
pp. 20-37 ◽  
Author(s):  
R. L. McIntosh ◽  
O. Maass ◽  
N. G. M. Tuck
Keyword(s):  
Carbon Tetrachloride ◽  
Adsorption Isotherm ◽  
Diethyl Ether ◽  
Apparent Density ◽  
Physical Adsorption ◽  
Langmuir Equation ◽  
Liquid Density ◽  
Accurate Data ◽  
Normal Liquid ◽  
Density Values

The apparent density of the adsorbate and the adsorption isotherm have been measured in the systems carbon tetrachloride – charcoal and diethyl ether – charcoal. In both, the apparent density of the adsorbate is lower than the normal liquid density. These abnormally low values cannot be explained on the basis of the coexistence of 'vapor' and 'liquid' adsorbed phases. The results are consistent with the concept of the adsorbatc's blocking-off a portion of the internal voids of the charcoal. The Langmuir equation represents the isotherm only when the quantity adsorbed exceeds two-thirds of the saturation value. The Harkins–Jura equation is valid at low relative pressures in the carbon tetrachloride – charcoal system, but not in the diethyl ether – charcoal system. Neon is adsorbed appreciably on charcoal at 25 °C. and therefore cannot be employed to examine the effect that the gas being used for the measurements has on the apparent density of the adsorbate. Until more accurate data are available for the adsorption of helium on charcoal, both in the absence and presence of other adsorbates, the density of charcoal and the density of the adsorbate measured by helium displacement remain suspect. In view of the uncertainties, the utility of apparent density values of adsorbates in checking the concepts of the various theories of physical adsorption is limited.

scholarly journals The second virial coefficients of organic vapours

1949 ◽  
Vol 196 (1044) ◽  
pp. 113-125 ◽  
Keyword(s):  
Thermal Conductivity ◽  
Hydrogen Bonding ◽  
Carbon Tetrachloride ◽  
Diethyl Ether ◽  
Methyl Alcohol ◽  
Virial Coefficients ◽  
Dipole Interaction ◽  
Conductivity Data ◽  
Second Virial Coefficients ◽  
Critical Data

The compressibilities of a num ber of organic vapours have been measured at pressures up to 1 atm. and temperatures ranging from 40 to 130° C. The observed second virial coefficients are compared with values calculated from the critical data by the Berthelot equation. The results show two distinct classes of behaviour. Class I is shown by ethane, ethylene, n -hexane, cyclohexane, benzene, diethyl ether, ethyl chloride, chloroform and carbon tetrachloride, where the measured second virial coefficients are in agreement with the calculated values. Class II by acetaldehyde, acetone, acetonitrile, methyl alcohol, where the measured second virial coefficients are consistently very much higher than the calculated values. It is concluded that the vapours of polar substances for which the energy of attraction between molecules, due to dipole interaction or to hydrogen bonding, is larger than kT undergo dim erization. This view is supported by thermal conductivity data. The range of validity of the Berthelot equation for both non-polar and polar vapours is examined.

Validation of a new adhesive coating solution: comparative study of carbon tetrachloride and diethyl ether

Aerobiologia ◽  
2014 ◽  
Vol 31 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Michel Thibaudon ◽  
Carmen Galán ◽  
Carlo Lanzoni ◽  
Samuel Monnier
Keyword(s):  
Carbon Tetrachloride ◽  
Comparative Study ◽  
Diethyl Ether ◽  
Coating Solution ◽  
Adhesive Coating
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