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Solubility System: Nitroethane with 3-Methylpentane (Original Report)

Variables:
Temperature: 288 K - 299 K
Experimental Remarks:
UCST is 26.450°C at x1 = 0.500 (100 w1 = 46.6, compilers).
Experimental Data:
T (°C)T (K)Density (dyn/cm)
15.089288.239708.119.16
20.005293.155716.318.66
22.006295.156723.718.56
25.004298.154-18.21
26.005299.155753.418.12
26.203299.353-18.14
T (°C)T (K)Density (dyn/cm)
15.089288.239930.819.73
20.005293.155903.319.00
22.006295.156887.418.70
25.004298.154-18.33
26.005299.155836.418.19
26.203299.353-18.14
Method/Apparatus/Procedure:

The synthetic method was used. Mixtures of near-critical composition were made in glass tubes, closed at one end and joined to vacuum-tight Teflon-glass valves. Phase-separation temperatures were determined visually. The critical composition sample was the one most opalescent at its phase-separation temperature. Two different pycnometers, volumes 25 mL & 50 mL, of the type glass-bulb-to-capillary, were used to determine densities of mixtures. Surface tension was measured by the differential-capillary-rise method using a sample cell adapted from Calado et al.1

Source and Purity of Materials:

(1) Aldrich Chemical Inc.; purity 96.0 mass%; dried and double distilled under a reduced pressure in a 36 in. glass column; purity 99.96-99.98 mass%.
(2) Aldrich Chemical Inc.; research grade; purity 96.0 mass%; distilled at atmospheric pressure in the 36 in. glass column; purity 99.99 mass% by GLC.

Estimated Errors

Temperature: Not specified.

References:

(1) J. C. G. Calado, I. A. McLure, and V. A. M. Soares, Fluid Phase Equilib. 2, 199 (1978).

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