Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons at T = (303.15 to 323.15) K and atmospheric pressure
Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons, such as toluene, o-xylene, and mesitylene were measured at T = (303.15 to 323.15) K and atmospheric pressure. The measurements were carried out over the whole range of composition using A-type Ostwa...
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Elsevier
2025-06-01
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| Series: | Chemical Thermodynamics and Thermal Analysis |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667312625000288 |
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| author | M. Abdur Rahaman M. Kamrul Hossain Shamim Akhtar Hossain M. Shahadat |
| author_facet | M. Abdur Rahaman M. Kamrul Hossain Shamim Akhtar Hossain M. Shahadat |
| author_sort | M. Abdur Rahaman |
| collection | DOAJ |
| description | Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons, such as toluene, o-xylene, and mesitylene were measured at T = (303.15 to 323.15) K and atmospheric pressure. The measurements were carried out over the whole range of composition using A-type Ostwald viscometer and Abbe Utility (Abbe 60/E) refractometer. From dynamic viscosity data, viscosity deviation and excess Gibbs free energy of activation were calculated, while the excess molar refraction was obtained from refractive index data. The values of dynamic viscosity and refractive index were fitted with concentration dependent 4th order polynomial equation and their excess values to the Redlich–Kister type polynomial equation. The viscosity deviation and excess free energy of activation with respect to mole fraction of aromatic hydrocarbons formed negative lobe with minima at x2 = 0.55, whereas deviation of refractive index formed negative lobe for n-heptane + toluene system and positive lobe for n-heptane + o-xylene and n-heptane + mesitylene systems. Dispersive force is dominated in n-heptane + toluene system, whereas favorable geometric fitting is responsible for other two systems. |
| format | Article |
| id | doaj-art-6baa9082ae534c8caf44b4e93d0d4af6 |
| institution | OA Journals |
| issn | 2667-3126 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
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| series | Chemical Thermodynamics and Thermal Analysis |
| spelling | doaj-art-6baa9082ae534c8caf44b4e93d0d4af62025-08-20T02:05:09ZengElsevierChemical Thermodynamics and Thermal Analysis2667-31262025-06-011810018810.1016/j.ctta.2025.100188Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons at T = (303.15 to 323.15) K and atmospheric pressureM. Abdur Rahaman0M. Kamrul Hossain1Shamim Akhtar2Hossain M. Shahadat3Department of Chemistry, Mawlana Bhashani Science and Technology University, Tangail, 1902, Bangladesh; Corresponding authors.Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong, 4331, BangladeshDepartment of Chemistry, Faculty of Science, University of Chittagong, Chittagong, 4331, BangladeshLab. of Organometallics, Catalysis and Ordered Materials (LOCOM), Comilla University, Cumilla, 3506, Bangladesh; Department of Chemistry, Faculty of Science, Comilla University, Cumilla, 3506, Bangladesh; Corresponding authors.Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons, such as toluene, o-xylene, and mesitylene were measured at T = (303.15 to 323.15) K and atmospheric pressure. The measurements were carried out over the whole range of composition using A-type Ostwald viscometer and Abbe Utility (Abbe 60/E) refractometer. From dynamic viscosity data, viscosity deviation and excess Gibbs free energy of activation were calculated, while the excess molar refraction was obtained from refractive index data. The values of dynamic viscosity and refractive index were fitted with concentration dependent 4th order polynomial equation and their excess values to the Redlich–Kister type polynomial equation. The viscosity deviation and excess free energy of activation with respect to mole fraction of aromatic hydrocarbons formed negative lobe with minima at x2 = 0.55, whereas deviation of refractive index formed negative lobe for n-heptane + toluene system and positive lobe for n-heptane + o-xylene and n-heptane + mesitylene systems. Dispersive force is dominated in n-heptane + toluene system, whereas favorable geometric fitting is responsible for other two systems.http://www.sciencedirect.com/science/article/pii/S2667312625000288Viscosity deviationRefractive indexExcess molar refractionEnergy of activationn-heptaneAromatic hydrocarbon |
| spellingShingle | M. Abdur Rahaman M. Kamrul Hossain Shamim Akhtar Hossain M. Shahadat Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons at T = (303.15 to 323.15) K and atmospheric pressure Chemical Thermodynamics and Thermal Analysis Viscosity deviation Refractive index Excess molar refraction Energy of activation n-heptane Aromatic hydrocarbon |
| title | Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons at T = (303.15 to 323.15) K and atmospheric pressure |
| title_full | Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons at T = (303.15 to 323.15) K and atmospheric pressure |
| title_fullStr | Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons at T = (303.15 to 323.15) K and atmospheric pressure |
| title_full_unstemmed | Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons at T = (303.15 to 323.15) K and atmospheric pressure |
| title_short | Dynamic viscosity and refractive index of aliphatic n-heptane with substituted aromatic hydrocarbons at T = (303.15 to 323.15) K and atmospheric pressure |
| title_sort | dynamic viscosity and refractive index of aliphatic n heptane with substituted aromatic hydrocarbons at t 303 15 to 323 15 k and atmospheric pressure |
| topic | Viscosity deviation Refractive index Excess molar refraction Energy of activation n-heptane Aromatic hydrocarbon |
| url | http://www.sciencedirect.com/science/article/pii/S2667312625000288 |
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