A new method of measuring second virial coefficients of condensible vapours

Abstract

A new method for determining second virial coefficients of condensible vapours is described which eliminates contact between the vapour and mercury, and avoids the necessity for accurate volume calibrations, and which depends on pressure measurements only. The method has been tested with n-hexane and the results obtained suggest that the technique is capable of detecting and eliminating effects due to the contribution of third virial coefficients. New data for the second virial coefficient are reported.