DETERMINATION OF THE DENSITY IN THE GAS-PHASE WITH A COMPUTER-CONTROLLED MEASURING SYSTEM OF THE DIELECTRIC-CONSTANT

A computer-controlled measuring system (CCMS) of the dielectric consta nt (epsilon) in the gas phase as a function of pressure (P) and temper ature (T) is described. The automated experimental setup is capable of performing the necessary measurements for the determination of the fi rst three dielectric virial coefficients. Combining the value of epsil on with these dielectric virial coefficients, it is possible to calcul ate the density and, hence, the compressibility factor of the gas. The CCMS is as accurate as the best methods for the determination of rho and has the ability to produce numerous experimental data in a short p eriod of time. (C) 1995 American Institute of Physics.