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The Tricritical Point in an Ethanediol-Nitroethane-Cyclohexane Methanol Solution

Phase Transitions, ISSN: 1029-0338, Vol: 4, Issue: 1, Page: 73-80
1983
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Applying the polythermal method the coexistence region of three liquid phases in an ethanediol-nitroethane-cyclohexane-methanol system has been found for several temperatures. From this the temperature and composition of the tricritical point has been determined as T= 37.5 ± 1°C and mass fraction:x= 0.09 ± 0.01,.v= 0.45 ± 0.01 x= 0.40 ± 0.02, X= 0.060 + 0.005. The point at which, for a given polytherm, the transition from a two-phase to a three-phase region takes place at the highest temperature is identified as the critical end-point. Functions of temperature versus heights of menisci separating the individual phases have been determined for selected values of concentration. © 1983, Taylor & Francis Group, LLC. All rights reserved.

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