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

✍ Scribed by T. Groβ; J. Buchhauser; W.E. Price; I.N. Tarassov; H.-D. Lüdemann

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 634 KB
• Volume: 73-74
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/s0167-7322(97)00086-x

✦ Synopsis

Sell'-d~ft'u~~on coefficients D for fluid NHi 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 Hz0 and the lower alcohols D of NH3 shows a surf"-isinely 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 bontl~n~ upon the translational dynamics in NH?.