Pentane (data page)

This page provides supplementary chemical data on n-pentane.

Contents

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 SIRI, and follow its directions. MSDS for pentane is available at Mallinckrodt Baker.

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 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

UV-Vis
λmax  ? nm
Extinction coefficient, ε  ?
IR
Major absorption bands  ? cm−1
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, and A. Leipertz (June 2003). "Viscosity and Surface Tension of Saturated n-Pentane" (PDF). National Institute of Standards and Technology (15th Symposium on Thermophysical Properties). http://symp15.nist.gov/pdf/p217.pdf. 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. http://www.cheric.org/research/kdb/hcprop/cmpsrch.php. Retrieved 30 May 2007. 

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

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