Abstract
Abstract Quasi-isochoric pϱT measurements on n-hexane 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 extend over the temperature range between 350 and 600 K and the density range between 21 and 61 mol/m3. 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 applying the same cell are also presented. These data have an assumed uncertainty of ± 20 Pa and are in good agreement with other experimental data as well as with a recently published correlation (Ambrose and Walton, 1989).
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