This paper reports comprehensive and accurate measurements of the speed of sound in pure n-butane in the liquid region. The measurements were carried out by a double-path-length pulse-echo technique and cover the temperature range between 200 and 430 K with pressures up to 100 MPa. The expanded uncertainties (at the 95% confidence level) are 2.1 mK for temperature, 0.007% for pressure, and 0.016% for speed of sound. Comparisons with several equations of state and literature data demonstrate that the Helmholtz energy formulation for n-butane can be improved significantly with our accurate data.
Compounds
#
Formula
Name
1
C4H10
butane
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.