Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Estimating the Virial Coefficients of the Ammonia + Water Mixture

Published

Author(s)

L A. Weber

Abstract

A corresponding states type model has been used to estimate the second and third virial coefficients of the NH3 + H2O mixture. Additional mixing parameters were added to the formulations for both coefficients to account for the chemical interactions between unlike molecules. The mixing parameters were optimized using experimental gas density data from 373 to 498 K and phase equilibrium data at temperatures below 400 K, and the model (in conjunction with a suitable activity coefficient model) represented these data satisfactorily. Extrapolation of the model to higher temperatures and pressures revealed good agreement with existing VLE data to 589 K and with new density data to 773 K at pressures over 10 Mpa.
Citation
Fluid Phase Equilibria
Volume
162

Keywords

activity coefficients, ammonia + water, mixtures, phase equilibrium, virial coefficients

Citation

Weber, L. (1999), Estimating the Virial Coefficients of the Ammonia + Water Mixture, Fluid Phase Equilibria (Accessed May 29, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created March 1, 1999, Updated February 17, 2017