Abstract
Quasi-isochoric pθT measurements on benzene vapor were carried out in the low density region using an improved apparatus that was originally proposed by Opel and Schaffenger (1969). The experimental results cover the temperature range between 350 and 600 K and the density range between 13 and 44 mol m 3 . The study includes results that were measured with a similar apparatus by Pietsch (1978) which have been reanalyzed. 2nd virial coefficients are derived with an assumed maximum uncertainty of ± 1.5 per cent. The results are compared with others in the literature and used to develop an improved correlation function for the temperature dependence of B(T). Vapor pressures measured using the same cell are also presented. These are in good agreement with other experimental data as well as with a recently published correlation.
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