Pentane (data page)

This page provides supplementary chemical data on n-pentane.

Material Safety Data Sheet

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 MSDS Search Engine, and follow its directions.

Structure and properties

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

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
, ΔfusHo
8.4 kJ/mol
Std entropy change
of fusion
, ΔfusSo
58.5 J/(mol·K)
Std enthalpy change
of vaporization
, ΔvapHo
26.200 kJ/mol at 25 °C
25.79 kJ/mol at 36.1 °C
Std entropy change
of vaporization
, ΔvapSo
87.88 J/(mol·K) at 25 °C
Solid properties
Std enthalpy change
of formation
, ΔfHosolid
? kJ/mol
Standard molar entropy,
Sosolid
? J/(mol K)
Heat capacity, cp ? J/(mol K)
Liquid properties
Std enthalpy change
of formation
, ΔfHoliquid
–173.5 kJ/mol
Standard molar entropy,
Soliquid
263.47 J/(mol K)
Enthalpy of combustion, ΔcHoliquid –3509 kJ/mol
Heat capacity, cp 167.19 J/(mol K) at 25 °C
Gas properties
Std enthalpy change
of formation
, ΔfHogas
–146.8 kJ/mol
Standard molar entropy,
Sogas
347.82 J/(mol K)
Enthalpy of combustion, ΔcHogas –3535 kJ/mol
Heat capacity, cp 120.07 J/(mol K) at 25 °C

Vapor pressure of liquid

P in mm Hg11040100400760152038007600152003040045600
T in °C–76.6–50.1–29.2–12.618.536.158.092.4124.7164.3  

Table data obtained from CRC Handbook of Chemistry and Physics 47th ed.

Spectral data

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
 

References

  1. Lange's Handbook of Chemistry, 10th ed. pp. 1234–1237
  2. Lange's Handbook of Chemistry, 10th ed. pp. 1289–1376
  3. 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). Retrieved 30 May 2007.
  4. Lange's Handbook of Chemistry, 10th ed. pp. 1669–1674
  5. "Pure Component Properties" (Queriable database). Chemical Engineering Research Information Center. Retrieved 30 May 2007.
  6. 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.

Except where noted otherwise, data relate to standard ambient temperature and pressure.

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