Concept of a new technique for the combined determination of dielectric and density virial coefficients3

Abstract

For the combined determination of dielectric and density virial coefficients, a new measurement concept based on dielectric-constant gas thermometry (DCGT) has been elaborated. The developed apparatus design allows conventional DCGT measurements as well as gas expansion experiments to enable a distinction between density and dielectric virial coefficients. The new technique presented in this technical design note offers an independent method to obtain experimental data, which are highly desirable for the improvement of thermodynamic property models for pure gases and gas mixtures.