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Diffusion coefficients are inversely proportional to total pressure or total molar density and are therefore reported by convention at a standard pressure of one atmosphere.
Diffusion coefficients increase with increasing temperature at a rate that depends on whether the pressure or the total molar density is held constant as the temperature is changed.
If the rate increases as Ts at constant molar density (where s usually lies between 1/2 and 1), then it will increase as T1 + s at constant pressure, according to the ideal gas equation of state.
Total molar density.
Molar density (lbmol/ft3).
Equivalent gas molar density, lbmol/RB.
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The equation was presented as a function of the difference in molar densities and surface tension.
In a hydrogen-water system, ({X_{L}^{h}}) and ({X_{G}^{h}}) refer to the molar fraction of the hydrogen in the two phases, and N L and N G are the respective molar densities [mol m −3].
Furthermore, the oxygen and water molar densities are shown to display a quasi-linear behavior with respect to the similarity variable.
We describe a new approach to obtaining a broad range of neutron energies to probe a sample, as well as our technique for reconstructing the molar densities within a sample.
Finally, with future algorithm development that accounts for backgrounds caused by scattering within the sample itself, the accuracy of molar densities, not ratios, may improve to the 5 10% level for a two hour scan time.
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