Measurement of the concentration diffusion coefficient for He-Ar and Ne-Kr by a two bulb method

✍ Scribed by Mathur, B. P. ;Saxena, S. C.

• Publisher: Springer
• Year: 1968
• Tongue: English
• Weight: 448 KB
• Volume: 18
• Category: Article
• ISSN: 0003-6994
• DOI: 10.1007/bf00382357

✦ Synopsis

A two bulb glass apparatus was used to measure the concentration diffusion coefficient of the binary gas systems He-Ar and Ne-iKr. The coefficients were determined for equimolar mixtures at temperatures between 0°C and 70°C. The diffusion was followed as a function of time by withdrawing samples and analyzing them in a specially designed thermal conductivity analyzer with high accuracy. The diffusion coefficients agree with earlier reported experimental values and with those obtained on the basis of the Chapman-Enskog theory in conjunction with the modified Buckingham exp-six and Lennard-Jones (12-6) intermolecular potentials. The smoothed values were used to predict viscosity and thermal conductivity of these mixtures as a function of composition and temperature.