Viscosities of iodobenzene + n-alkane mixtures at (288.15-308.15) K. Measurements and results from models
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2024
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| author | Sanz, Luis Felipe González, Juan Antonio Hevia, Fernando Lozano-Martín, Daniel de la Fuente, Isaías García Cobos, José Carlos |
| author_facet | Sanz, Luis Felipe González, Juan Antonio Hevia, Fernando Lozano-Martín, Daniel de la Fuente, Isaías García Cobos, José Carlos |
| contents | Kinematic viscosities were measured for iodobenzene + n-alkane mixtures at (288.15-308.15) K and atmospheric pressure. Using our previous density data, dynamic viscosities ($η$), deviations in absolute viscosity ($Δη$) and quantities of viscous flow were determined. The McAllister, Grunberg-Nissan and Fang-He correlation equations and Bloomfield-Dewan's model (with residual Gibbs energies calculated using DISQUAC with interaction parameters available in the literature) were applied to iodobenzene, or 1-chloronaphthalene, or 1,2,4-trichlorobenzene, or methyl benzoate or benzene or cyclohexane + n-alkane systems. The dependence of $U_{\text{m,}V}^{\text{E}}$ (isochoric molar excess internal energy) and $Δη$ with $n$ (the number of C atoms of the n-alkane) shows that the fluidization loss of mixtures containing iodobenzene, 1,2,4-trichlorobenzene, or 1-chloronaphthalene when $n$ increases is due to a decrease upon mixing of the number of broken interactions between like molecules. The breaking of correlations of molecular orientations characteristic of longer n-alkanes may explain the decreased negative $Δη$ values of benzene mixtures with $n$ =14,16. The replacement, in this type of systems of benzene by cyclohexane leads to increased positive $Δη$ values, probably due to the different shape of cyclohexane. On the other hand, binary mixtures formed by one of the aromatic polar compounds mentioned above and a short n-alkane show large structural effects and large negative $Δη$ values. From the application of the models, it seems that dispersive interactions are dominant and that size effects are not relevant on $η$ values. The free volume model provides good results for most of the systems considered. Results improve when, within Bloomfield-Dewan's theory, the contribution to $η$ of the absolute reaction rate model is also considered. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_05426 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Viscosities of iodobenzene + n-alkane mixtures at (288.15-308.15) K. Measurements and results from models Sanz, Luis Felipe González, Juan Antonio Hevia, Fernando Lozano-Martín, Daniel de la Fuente, Isaías García Cobos, José Carlos Chemical Physics Kinematic viscosities were measured for iodobenzene + n-alkane mixtures at (288.15-308.15) K and atmospheric pressure. Using our previous density data, dynamic viscosities ($η$), deviations in absolute viscosity ($Δη$) and quantities of viscous flow were determined. The McAllister, Grunberg-Nissan and Fang-He correlation equations and Bloomfield-Dewan's model (with residual Gibbs energies calculated using DISQUAC with interaction parameters available in the literature) were applied to iodobenzene, or 1-chloronaphthalene, or 1,2,4-trichlorobenzene, or methyl benzoate or benzene or cyclohexane + n-alkane systems. The dependence of $U_{\text{m,}V}^{\text{E}}$ (isochoric molar excess internal energy) and $Δη$ with $n$ (the number of C atoms of the n-alkane) shows that the fluidization loss of mixtures containing iodobenzene, 1,2,4-trichlorobenzene, or 1-chloronaphthalene when $n$ increases is due to a decrease upon mixing of the number of broken interactions between like molecules. The breaking of correlations of molecular orientations characteristic of longer n-alkanes may explain the decreased negative $Δη$ values of benzene mixtures with $n$ =14,16. The replacement, in this type of systems of benzene by cyclohexane leads to increased positive $Δη$ values, probably due to the different shape of cyclohexane. On the other hand, binary mixtures formed by one of the aromatic polar compounds mentioned above and a short n-alkane show large structural effects and large negative $Δη$ values. From the application of the models, it seems that dispersive interactions are dominant and that size effects are not relevant on $η$ values. The free volume model provides good results for most of the systems considered. Results improve when, within Bloomfield-Dewan's theory, the contribution to $η$ of the absolute reaction rate model is also considered. |
| title | Viscosities of iodobenzene + n-alkane mixtures at (288.15-308.15) K. Measurements and results from models |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2409.05426 |