Diffusion of gases: A physical chemistry experiment

Abstract

In the procedure the progress of diffusion is determined by measuring the change in conductivity over time.

Cross Second Virial Coefficients and Dilute Gas Transport Properties of the Systems (N2+ C3H8), (C2H6+ C3H8), and (H2S + C3H8) from Ab Initio-Based Intermolecular Potentials

“…For the (C 2 H 6 + C 3 H 8 ) system, the two available experimental data sets , agree very satisfactorily with the calculated values. The datum of Gover at room temperature (the exact temperature is not specified in the paper but is assumed to be 298.15 K) deviates from the calculated value by −1.4%, while the three data points of Gotoh et al agree even within 0.9% with our values.…”

“…For the (C 2 H 6 + C 3 H 8 ) system, the two available experimental data sets , agree very satisfactorily with the calculated values. The datum of Gover at room temperature (the exact temperature is not specified in the paper but is assumed to be 298.15 K) deviates from the calculated value by −1.4%, while the three data points of Gotoh et al agree even within 0.9% with our values. The data of Gotoh et al for the (CH 4 + C 2 H 6 ) and (CH 4 + C 3 H 8 ) systems (reported in the same paper) also agree well with the corresponding calculated values. , As one would expect, the values obtained with the unadjusted C 2 H 6 –C 3 H 8 PES deviate more significantly from the experimental data.…”

“…In Figures and , we compare our calculated ρ m D values for the systems (N 2 + C 3 H 8 ) and (C 2 H 6 + C 3 H 8 ), respectively, with experimental data, − values inferred by Abe et al , from their measured viscosities, and the values obtained with the unadjusted PESs. In addition, the ρ m D correlation of Chae et al for (N 2 + C 3 H 8 ) mixtures is shown in Figure .…”

“…Relative deviations of experimental data , and of values inferred from measured viscosities for the product of molar density and binary diffusion coefficient, ρ m D , of the (C 2 H 6 + C 3 H 8 ) system from the calculated values ρ m D calc of this work as a function of temperature T . The figure also shows the deviations of the values calculated using the unadjusted C 2 H 6 –C 3 H 8 PES.…”

A quantitative diffusion experiment

“…Watts described a class experiment consisting of the quantitative analysis of the total amount of a liquid diffused into a capillary containing another liquid (3). Finally Gover reported a study of gaseous diffusion performed by students; the concentration was measured in a gas chromatograph (4).…”