The p,T-dependence of self-diffusion in fluid ammonia

Authors

Thomas Gross, University of Regensburg
J Buchhauser, University of Regensburg
William E. Price, University of WollongongFollow
Igor N. Tarassov, University of Regensburg
Hans D. Ludemann, University of Regensburg

RIS ID

67370

Publication Details

Gross, T., Buchhauser, J., Price, W. E., Tarassov, I. N. & Ludemann, H. D. (1997). The p,T-dependence of self-diffusion in fluid ammonia. Journal of Molecular Liquids, 73-74 433-444.

Abstract

Self-diffusion coefficients D for fluid NH1 have been obtained at high pressures by the NMR pulsed field gradient method for the first time between the melting pressure curve and 473 K at pressures up to 200 MPa. Compared to H20 and the lower alcohols D of NH, shows a ,urprisingly weak T dependence. The data are analyzed in the rough-hard-sphere (RHS) model. The A-parameter of this model gives no indication for the influence of hydrogen bonding upon the translational dynamics in NH,.