Determination of the density in the gas phase with a computer-controlled measuring system of the dielectric constant

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Abstract
A computer-controlled measuring system (CCMS) of the dielectric constant (ε) in the gas phase as a function of pressure (P) and temperature (T) is described. The automated experimental setup is capable of performing the necessary measurements for the determination of the first three dielectric virial coefficients. Combining the value of ε with these dielectric virial coefficients, it is possible to calculate the density and, hence, the compressibility factor of the gas. The CCMS is as accurate as the best methods for the determination of ρ and has the ability to produce numerous experimental data in a short period of time.