This page provides supplementary chemical data on n-pentane.
Material Safety Data Sheet edit
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as eChemPortal, and follow its directions.
Structure and properties edit
Structure and properties | |
---|---|
Index of refraction,[1] nD | 1.3575 at 20 °C |
Abbe number | ? |
Dielectric constant,[2] εr | 1.844 ε0 at 20 °C |
Bond strength | ? |
Bond length | ? |
Bond angle | ? |
Magnetic susceptibility | ? |
Surface tension[3] | 18.16 dyn/cm at 0 °C 17.03 dyn/cm at 10 °C 15.82 dyn/cm at 20 °C 14.73 dyn/cm at 30 °C 13.66 dyn/cm at 40 °C |
Viscosity[4] | 0.2894 mPa·s at 0 °C 0.2395 mPa·s at 20 °C 0.2200 mPa·s at 30 °C |
Thermodynamic properties edit
Phase behavior | |
---|---|
Triple point | 143.46 K (–128.69 °C), 0.076 Pa |
Critical point | 469.8 K (196.7 °C), 3360 kPa |
Std enthalpy change of fusion, ΔfusH |
8.4 kJ/mol |
Std entropy change of fusion, ΔfusS |
58.5 J/(mol·K) |
Std enthalpy change of vaporization, ΔvapH |
26.200 kJ/mol at 25 °C 25.79 kJ/mol at 36.1 °C |
Std entropy change of vaporization, ΔvapS |
87.88 J/(mol·K) at 25 °C |
Solid properties | |
Std enthalpy change of formation, ΔfH |
? kJ/mol |
Standard molar entropy, S |
? J/(mol K) |
Heat capacity, cp | ? J/(mol K) |
Liquid properties | |
Std enthalpy change of formation, ΔfH |
–173.5 kJ/mol |
Standard molar entropy, S |
263.47 J/(mol K) |
Enthalpy of combustion, ΔcH |
–3509 kJ/mol |
Heat capacity, cp | 167.19 J/(mol K) at 25 °C |
Gas properties | |
Std enthalpy change of formation, ΔfH |
–146.8 kJ/mol |
Standard molar entropy, S |
347.82 J/(mol K) |
Enthalpy of combustion, ΔcH |
–3535 kJ/mol |
Heat capacity, cp | 120.07 J/(mol K) at 25 °C |
Vapor pressure of liquid edit
P in mm Hg | 1 | 10 | 40 | 100 | 400 | 760 | 1520 | 3800 | 7600 | 15200 | 30400 | 45600 | |
T in °C | –76.6 | –50.1 | –29.2 | –12.6 | 18.5 | 36.1 | 58.0 | 92.4 | 124.7 | 164.3 | — | — |
Table data obtained from CRC Handbook of Chemistry and Physics 47th ed.
Spectral data edit
UV-Vis | |
---|---|
λmax | ? nm |
Extinction coefficient, ε | ? |
IR | |
Major absorption bands | 2881, 2940, 2965 cm−1 [6] |
NMR | |
Proton NMR | |
Carbon-13 NMR | |
Other NMR data | |
MS | |
Masses of main fragments |
This box:
- Except where noted otherwise, data relate to Standard temperature and pressure.
- Reliability of data general note.
References edit
- ^ Lange's Handbook of Chemistry, 10th ed. pp. 1234–1237
- ^ Lange's Handbook of Chemistry, 10th ed. pp. 1289–1376
- ^ A.P. Fröba; L. Penedo Pellegrino & A. Leipertz (June 2003). "Viscosity and Surface Tension of Saturated n-Pentane" (PDF). National Institute of Standards and Technology (15th Symposium on Thermophysical Properties). Archived from the original (PDF) on 9 October 2006. Retrieved 30 May 2007.
- ^ Lange's Handbook of Chemistry, 10th ed. pp. 1669–1674
- ^ "Pure Component Properties" (Queriable database). Chemical Engineering Research Information Center. Retrieved 30 May 2007.
- ^ Klingbeil, Adam E.; Jeffries, Jay B.; Hanson, Ronald K. (2007). "Temperature-dependent mid-IR absorption spectra of gaseous hydrocarbons". Journal of Quantitative Spectroscopy and Radiative Transfer. 107 (3): 407–420. doi:10.1016/j.jqsrt.2007.03.004.
- Linstrom, Peter (1997). "NIST Standard Reference Database". National Institute of Standards and Technology. doi:10.18434/T4D303.
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