title: Density measurements of compressed-liquid dimethyl ether + pentane mixtures.
abstract: Compressed-liquid densities of three compositions of the binary mixture dimethyl ether (CAS No. 115-10-6) + pentane (CAS No. 109-66-0) have been measured with a vibrating U-tube densimeter. Measurements were made at temperatures from 270 K to 390 K with pressures from 1.0 MPa to 50 MPa. The overall combined uncertainty (k=2) of the density data is 0.81 kg·m-3. Data presented here have been used to improve a previously formulated Helmholtz energy based mixture model. The newly derived parameters are given.
authors.affiliation: National Institute of Standards and Technology, Material Measurement Laboratory, Applied Chemicals and Materials Division, 325 Broadway, Boulder, CO 80305-3337, U.S.A.
authors.forename: Stephanie L
authors.initials: SL
authors.lastname: Outcalt
authors.affiliation: National Institute of Standards and Technology, Material Measurement Laboratory, Applied Chemicals and Materials Division, 325 Broadway, Boulder, CO 80305-3337, U.S.A.
authors.forename: Eric W
authors.initials: EW
authors.lastname: Lemmon
keywords: Compressed liquid; Helmholtz energy mixture model; dimethyl ether; pentane; vibrating-tube densimeter