Dielectric constants and molar polarizabilities of saturated and compressed fluid nitrogen

Abstract

In this paper we present accurate, wide range measurements of the dielectric constant of saturated and compressed fluid nitrogen. Measurements were made from 65 to 125 K along the saturated liquid boundary and along selected liquid and gaseous isotherms ranging from 92 to 300 K at pressures to 34.5 MPa. Densities ranged from the dilute gas to nearly three times the critical density. Molar polarizabilities, thought to be accurate to better than 0.10%, were calculated by combining the dielectric constant measurements with densities obtained from least‐squares analyses of experimental pVT data. A correlation function based on selected experimental data is given for the saturated liquid densities. Dielectric virial coefficients, derived from the calculated molar polarizabilities, are also presented.