Densities of liquid ammonia in the temperature range from 310 K to 360 K at pressures up to 200 MPa

✍ Scribed by T. Ichihara; M. Uematsu

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 192 KB
• Volume: 26
• Category: Article
• ISSN: 0021-9614
• DOI: 10.1006/jcht.1994.1132

✦ Synopsis

Density measurements at given temperatures and pressures in the compressed liquid phase for ammonia were carried out with a metal-bellows variable volumometer along four isotherms between (310 \mathrm{~K}) and (360 \mathrm{~K}) at pressures from the vapor pressure to (200 \mathrm{MPa}). The results cover the high-density region from (492 \mathrm{~kg} \cdot \mathrm{m}^{-3}) to (693 \mathrm{~kg} \cdot \mathrm{m}^{-3}). The experimental uncertainties of temperature (T), pressure (p), and density (\rho) were estimated to be (\ngtr|3 \mathrm{mK}|,|0.0010 \cdot p|), and (|0.0010 \cdot \rho|), respectively. Measurements of vapor pressure at temperatures from (310 \mathrm{~K}) to (400 \mathrm{~K}) as well as those of saturated liquid density from (310 \mathrm{~K}) to (360 \mathrm{~K}) are also reported. The isothermal compressibility and the isobaric expansivity on the basis of the present results are illustrated.