SDS Volume
Volume 38. Hydrocarbons in Water and Seawater, Part II, p None
Source Publication
Ben-Naim, A.; Wilf, J.; Yaacobi, M.; J. Phys. Chem. 1973, 77, 95-102.
Conditions:
Room Temp: 10 - 50 °C
Compiler:
Methodology:
Solubilities were determined spectroscopically. Saturated solutions were prepared in two ways: (a) direct mixing of benzene and water for ca. 48 h, (b) dissolution of benzene through the vapor phase. Absorbances of the solutions and their vapors were measured directly at $\lambda_{\rm{max}}$ with a Model 450 Perkin-Elmer spectrophotometer with a thermostatted cell holder. Establishment of equilibrium was checked by use of a special three compartment cell, details of which are given in the paper.
Sample Information:
- Fluka; puriss, 99.94%, used as received.
- Fluka, 99.75%, used as received.
Measurement Errors:
Ambient temperature: ±0.05°C
Mass concentration (m/v) (1): std. dev. In Δµ°s, 270.15 cal/mol.
System Components:
- Biphenyl, $\ce{ C12H10 }$; [92-52-4] NIST WebBook
- Water-d2, $\ce{ D2O }$; [7789-20-0] NIST WebBook
Experimental Data
The solubility of biphenyl in heavy water is expressed in terms of the standard free energy of solution, Δμso, determined as:
Δμso = lim (ps→ o) [-RT ℓn(psℓ/psg)eq]
where (psℓ/psg)eq is the Ostwald absorption coefficient and psℓ and psg are respectively the molar concentrations of the solute s in the liquid and the gas phase at equilibrium.
For the temperature range studied, Δμso was fitted to a second degree polynomial of the form:
Δμso = -12827.6 + 39.059 t - 0.01945 t2
where t is in°C (10 < t < 50°C) and Δμso is in cal/mol (1 cal = 4.184 J).
Values of the Ostwald absorption coefficient are also reported.
