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IUPAC-NIST Solubility Database
NIST Standard Reference Database 106
Solubility System:
Nitromethane with Gases
Components:
(1) Nitromethane; CH3NO2; [75-52-5]
NIST Chemistry WebBook
for detail
(2) Gases; Kr, Ne, N2 and Xe; []
NIST Chemistry WebBook
for detail
Original Measurements:
Friedman, H.L., J. Am. Chem. Soc. 74, 3294-7 (1954).
Variables:
Temperature = 298 K
Prepared By:
V. P. Sazonov
Experimental Data:
(Notes on the Nomenclature)
Solubility of gases in nitromethane
t/°C
T/K
Chemical Name
Ostwald coefficient, L /dimensionless
Comment(s)
24.85
298.00
Krypton; Kr; [7439-90-9]
0.380
0.381; 0.378
24.85
298.00
Neon; Ne; [7440-01-9]
0.0245
0.0241; 0.0249
24.85
298.00
Nitrogen; N2; [7727-37-9]
0.091
0.091
24.85
298.00
Xenon; Xe; [7440-63-3]
1.14
1.15; 1.11; 1.15
Method/Apparatus/Procedure:
The method was essentially that employed Eucken and Herzberg.
1
The solvent was degassed by alternately opening to the vacuum pump for 5-15 s and then stirring very rapidly to produce cavitation. This was repeated 5-10 times. In the solubility measurement itself gas, which had been previously saturated with solvent vapor, was admitted to the saturation vessel, holding about 80 mL of solution, and with 5-10 mL remaining space, volume-time measurements were taken and extrapolated back to the time the gas was admitted. Then the stirrer was turned on and driven very fast, producing a slightly (~1%) supersaturated solution. The approach to equilibrium was then followed from each direction while stirring as rapidly as possible without producing cavitation and bubbles.
Source and Purity of Materials:
(1) Source not specified; purity not specified; redistilled and dried by filtering at -20 °C.
(2) Krypton, neon and xenon were reagent grade products of the Air Reduction Co.; purity 99.8 mass %; nitrogen was purified by passing over CaH
2
and CaO.
Estimated Errors:
Solubility: relative error of 2 to 3 determinations less than 3 %.
References:
1
A. Eucken and G. Herzberg, Z. Phys. Chem. (Leipzig) 195, 1 (1950).