Speeds of Sound in n-Pentane at Temperatures from 233.50 to 473.15 K at Pressures up to 390 MPa

Christian W. Scholz, Yolanda Sanchez-Vicente, Tana Tananilgul, Monika Thol, J. P. Martin Trusler, Markus Richter*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We report speeds of sound in n-pentane measured using two similar apparatus, located at Ruhr University Bochum (RUB) and Imperial College London (ICL), covering different ranges of temperature and pressure. At RUB, measurements were conducted at temperatures from 233.50 to 353.20 K with pressures up to 20 MPa, while temperatures from 263.15 to 473.15 K with pressures up to 390 MPa were covered at ICL. Accounting for the uncertainties in temperature, pressure, path-length calibration, and pulse timing, the relative expanded combined uncertainty (k = 2) in the speed of sound varied from 0.015 to 0.18% over the whole region investigated. Nevertheless, small differences averaging at 0.13% are found between the two data sets in the region of overlap. The experimental data reported in this work have been partly used in the development of a new fundamental equation of state for n-pentane.
Original languageEnglish
Pages (from-to)3679-3689
Number of pages11
JournalJournal of Chemical and Engineering Data
Issue number7
Early online date25 Jun 2020
Publication statusPublished - 9 Jul 2020

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