The estimation of molecular parameters for the stockmayer (12-6-3) potential using critical properties
✍ Scribed by Evangelos A. Halkiadakis; Ronald G. Bowrey
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 639 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0009-2509
No coin nor oath required. For personal study only.
✦ Synopsis
Molecular parameters for the Stockmayer (12-6-3) potential are given for 26 non-polar and 19 polar compounds. These parameters were evaluated by minimising the sum of the squares of the fractional deviations between experimental viscosity data obtained from the literature and the values calculated from the Chapman-Enskog equation using the Stockmayer potential. The molecular parameters obtained for both polar and non-polar compounds can be correlated by dimensionless equations: (+ = 0.687( V, IN,)"" c = 0404kT,z,-0"'. For non-polar compounds the parameters are correlated by: D = 0.326( v, /N, )"'z~-~+ l = 2.80kT,zTr". Viscosity data for most of the 45 compounds studied, calculated directly from the given parameters or indirectly via the correlations, fall within the claimed experimental accuracies. The main exceptions are when using the correlations to estimate the viscosity of water, nitric oxide, ammonia and methanol.