The coexistence curve and diffusion coefficient for the binary liquid system heptane-nitrobenzene have been obtained using an optical technique in which laser light is refracted through a quartz sample cell. Analysis of the resulting fringe patterns shows that the molar concentration difference ΔΧ between the coexisting liquid phases is equal to (.24±.01)x (Tc-T)•³³³±•⁰⁰⁵ over the temperature range .0001° ≤ (Tc -T) ≤ 11° C, and that the diffusion coefficient D at critical concentration
is equal to (3.7±1.5)xl0⁻⁷(T-Tc ) •⁷⁰±•⁰⁵ cm²/sec over the range .005° ≤ (T-Tc ) ≤ 2.7° C. It was found that the coexistence curve is symmetric about Xc, and that the diffusion coefficient as a function of concentration at a given temperature is also symmetric about Xc, near Xc. The critical temperature Tc = 19.07±.05°C. Temperature differences
near Tc were known to within .0001°C. The critical molar concentration of nitrobenzene Xc = .470±.003. In terms of dimensionless variables, where [formula omitted] over the range [formula omitted]. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/33312 |
| Date | January 1972 |
| Creators | Shelton, Jay Danny |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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