Title

Solid-liquid phase equilibria in systems of (i) para-xylene, (ii) mesitylene, and (iii) N,N-dimethylformamide ; Excess volume determination in systems containing cyclohexane ; Calculations of activities for the n-hexane + cyclohexane system

Abstract

Solid-liquid phase equilibria studies were used to investigate possible compolllld formation in solutions of (i) para-xylene, (ii) mesitylene, and (iii) N,N-dimethyl-formamide (DMF) with mono- and di- halobenzenes that were selected to give a wide range of acceptor properties. Solid 1:1 intermolecular compounds were identified from solutions of p-C_6H_4F_2 with mesitylene, p-C_6H_4Br_2 with p-xylene, and p-C_6H_4Cl_2 with p-xylene. The results suggest that compound formation occurs because of favorable geometry rather than a charge transfer process. A vibrating tube densimeter was used to determine, with high precision, the densities and subsequently excess volumes of mixing of the n-hexane plus cyclohexane system. Temperature dependence of excess volume of mixing for the system was established. Thermodynamic calculations were also performed to determine activities of the components of the n-hexane + cyclohexane system.

Degree

PhD

College and Department

Chemistry and Biochemistry

Rights

http://lib.byu.edu/about/copyright/

Date Submitted

1976-07-20

Document Type

Dissertation

Handle

http://hdl.lib.byu.edu/1877/Letd616

Keywords

Phase rule and equilibrium

Language

English

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