Abstract
Synopsis The coefficient of mutual diffusion of the binary gas mixtures A-He, A-Xe and He-Xe has been determined at 0, 15, 30 and 45C by allowing the diffusion to take place between two bulbs through a precision capillary tube. A differential conductivity analyser has been used to analyse the samples of the gas withdrawn from one of the bulbs at different times. These experimentally determined diffusion coefficients have been utilised for calculating the unlike potential parameters 12 /k and 12 on the Lennard-Jones 12:6 model and compared with the values obtained previously from thermal diffusion data and also from the usual combination rules. The agreement seems to be quite satisfactory. These experimentally determined values of 12 /k and 12 have been further used for calculating D 12 and are found to reproduce the experimental data satisfactorily.
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