Speeds of Sound, Densities, and Isentropic Compressibilities of 1-Iodohexane at Temperatures from (293.15 to 413.15) K and Pressures up to 200 MPa

Abstract

Experimental speeds of sound and densities are presented for the liquid phase of 1-iodohexane. The measurements were carried out along nine isotherms from (293.15 to 413.15) K at pressures from the saturation condition up to 200 MPa. The speed of sound was measured by a pulse-phase echo ultrasonic device at a frequency of (1 to 5) MHz with an uncertainty of ±0.2%. The density was measured by an acoustic piezometer with an uncertainty of ±0.3%. The experimental results have been used to calculate the isentropic compressibility, κ S .

Thermophysical Properties of the Medium-Chain 1-Alkyl Halides in a Wide Range of Conditions: New Experimental Data and Predictions of CP-PC-SAFT and FT-EOS

“…This time we report experimental and interpolated data on thermophysical properties of 1-chloroheptane and 1-iodoheptane at 216.08 ≤ T ≤ 423.1 K and 0.1 ≤ P ≤ 196.1 MPa. The current analysis covers also the previously published results for 1-iodohexane, 4 1chlorohexane, 5 and 1-chloropropane 6 in similar P−T ranges, along with the volumetric properties of 1-alkyl bromides 7,8 and the eminent 9 data 10−13 of Percy Williams Bridgman at very high pressures. Unfortunately, no elevated pressure data are available in open sources for the medium-chain 1-alkyl fluorides.…”

“…These procedures have been described in great detail in previous studies. 4,5 The highest temperature limit of measurements was defined by the boundary of a thermal stability of the substances around 413.15−423.15 K. The results are displayed in Tables S2 and S3.…”

“…The high-pressure measurements of densities and sound velocities were performed along isotherms in a cell placed into the thermostat, whose absolute error of temperature stabilization is 0.1 K. The external pressure has been produced by the dead-weight pressure gauge MP-2500 whose relative error is ±0.02%. These procedures have been described in great detail in previous studies. , The highest temperature limit of measurements was defined by the boundary of a thermal stability of the substances around 413.15–423.15 K. The results are displayed in Tables S2 and S3.…”

“…Figure 1 depicts the results of FT-EOS and CP-PC-SAFT for the densities and sound velocities in 1-hexyl and 1-heptyl chlorides and iodides at the lowest and the highest isotherms investigated in this and previous 4,5 studies up to ∼2000 bar. Unsurprisingly, CP-PC-SAFT accurately predicts the lowtemperature densities because these volumetric data are used for calculating the model parameters.…”

CHAPTER 13. Ultrasonics 2: High Pressure Speed of Sound, Isentropic Compressibility

“…Bolotnikov et al [45][46][47][48] and Hasanov et al 49,50 reported the u(T,P) for mainly liquid n-alkanes. Daridon and colleagues 51-68 have measured u(T,P), for ethers, esters and n-alkanes.…”