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Apparent molar volumes and viscosity B-coefficients of caffeine in aqueous thorium nitrate solutions at T = (298.15, 308.15, and 318.15) K
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sinha, Biswajit Roy, Pran Kumar Sarkar, Bipul Kumar Brahman, Dhiraj Roy, Mahendra Nath |
| Copyright Year | 2010 |
| Abstract | Apparent molar volumes ϕ V and viscosity B -coefficients for caffeine in (0.00, 0.03, 0.05, and 0.07) mol · dm −3 aqueous thorium nitrate, Th(NO 3 ) 4 , solutions were determined from solution density and viscosity measurements over the temperature range (298.15 to 318.15) K as function of concentration of caffeine and the relation: ϕ V ∘ = a 0 + a 1 T + a 2 T 2 , have been used to describe the temperature dependence of the standard partial molar volumes ϕ V ∘ . These results have been used to deduce the standard volumes of transfer Δ ϕ V ∘ and viscosity B -coefficients of transfer Δ B for caffeine from water to aqueous Th(NO 3 ) 4 solutions for rationalizing various interactions in the ternary solutions. The structure-making or breaking ability of caffeine has been discussed in terms of the sign of ( δ 2 ϕ V ∘ / δ T 2 ) P . The Friedman–Krishnan co-sphere model was used to explain the transfer volume of caffeine with increasing Th(NO 3 ) 4 molarity. The activation parameters of viscous flow for the ternary solutions were also discussed in terms of transition state theory. |
| Starting Page | 380 |
| Ending Page | 386 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.jct.2009.09.010 |
| Volume Number | 42 |
| Alternate Webpage(s) | http://shodhganga.inflibnet.ac.in:8080/jspui/bitstream/10603/12322/22/23_chapter%2011.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.jct.2009.09.010 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
