IUPAC-NIST Solubilities Database

IUPAC-NIST Solubility Database
NIST Standard Reference Database 106

Solubility System: Ethene with Sulfuric acid, diethyl ester (diethyl sulfate)

Components:
   (1) Sulfuric acid, diethyl ester (diethyl sulfate); C4H10O4S; [64-67-5]  NIST Chemistry WebBook for detail
   (2) Ethene; C2H4; [74-85-1]  NIST Chemistry WebBook for detail

Original Measurements:
   Truchard, A.M.; Harris, H.G.; Himmelblau, D.M., J. Phys. Chem. 1961, 65, 575-576.

Variables:
   Temperature = 273 K to 353 K
   Pressure = 101.325

Prepared By:
   W. Hayduk

Experimental Remarks:

   Calculated by compiler; mole fraction ethene, x₁, is for a partial pressure of 101.325 kPa.

Partial molal hear of solution tabulated by authors and based on equation:
      ΔH = 2.303 [∂ log H/∂ (1/T)]

Temperature coefficient of H expressed by:
      log H = 3.04666 – 0.132845 (10³) (1/T) – 5.39706(10⁴) (1/T)² ; T/K

Experimental Data:   (Subscripts 1,2,3, ..., in column headings refer to components 1,2,3, ...)


t/°C	T/K	Henry's law constant, K [atm (mole fraction)^–1]	Mole Fraction (x₁)	x₁ Note	Enthalpy [cal (mole)^–1]	Enthalpy Note
0	273.15	68.71	0.01455	1	2430	2, Partial Molal heat of solution
20	293.15	92.24	0.01084	1	2300	2, Partial Molal heat of solution
25	298.15	98.73	0.01013	1	2270	2, Partial Molal heat of solution
30	303.15	105.1	0.00951	1	2240	2, Partial Molal heat of solution
40	313.15	117.3	0.00853	1	2180	2, Partial Molal heat of solution
60	333.15	144.2	0.00693	1	2080	2, Partial Molal heat of solution
80	353.15	172.8	0.00579	1	1995	2, Partial Molal heat of solution

Notes:

Method/Apparatus/Procedure:
   Two calibrated glass spheres, one larger than the other, immersed in a bath connected to a mercury manometer were used. Approximately 200 cm³ of solvent was placed in the larger sphere and both were thoroughly evacuated. A supply of ethene was charged to the smaller flask to 2 atm pressure. Ethene was admitted to the flask containing the solvent and allowed to reach equilibrium by stirring. The pressures were read and material balances made to determine the solubility. Solubilities were measured for equilibrium pressures between 50 and 1300 mm of mercury pressure and Henry's law was found to apply in all cases.

Source and Purity of Materials:
   1. Ethene source and purity not given.
   2. Diethyl sulfate was Eastman practical grade purified by washing with Na₂CO₃ solution and drying with CaCl₂.

Estimated Errors:
   Solubility: δH/H = ± 0.02
   Temperature: δT/K = ± 0.05