This page provides supplementary chemical data on ethane.

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.

Structure and properties

Structure and properties
Index of refraction, nD  ?
Abbe number ?
Dielectric constant, εr  ? ε0 at ? °C
Bond strength  ?
Bond length  ?
Bond angle  ?
Magnetic susceptibility  ?
Surface tension 21.16 dyn/cm at −119.9 °C

Thermodynamic properties

Phase behavior
Triple point 91 K (−182 °C), 1.1 Pa
Critical point 305.3 K (32.2 °C), 4.9 MPa
Std enthalpy change
of fusion, ΔfusHo		 9.76 kJ/mol at −182 °C
Std entropy change
of fusion, ΔfusSo		 6.46 J/(mol·K) at −182 °C
Std enthalpy change
of vaporization, ΔvapHo
crystal I → liquid		 14.703 kJ/mol at −89.0 °C
Std entropy change
of vaporization, ΔvapSo
crystal I → liquid		 79.87 J/(mol·K) at −89.0 °C
Std enthalpy change
of state transition, ΔtrsHo
crystal II → crystal I		 2.282 kJ/mol at −183.3 °C
Std entropy change
of state transition, ΔtrsSo
crystal II → crystal I		 25.48 kJ/mol at −183.3 °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		  ? kJ/mol
Standard molar entropy,
Soliquid		 126.7 J/(mol K)
Heat capacity, cp 68.5 J/(mol K) at −179 °C
Gas properties
Std enthalpy change
of formation, ΔfHogas		 −83.8 kJ/mol
Standard molar entropy,
Sogas		 229.6 J/(mol K)
Enthalpy of combustion, ΔcHo −1560.7 kJ/mol
Heat capacity, cp 52.49 J/(mol K) at 25 °C
van der Waals' constants[1] a = 556.2 L2 kPa/mol2
b = 0.06380 L/mol

Vapor pressure of liquid

P in mm Hg11040100400760152038007600152003040045600
T in °C−159.5−142.9−129.8−119.3−99.6−88.6−75.0−52.8−32.0−6.423.6 —

Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.

Ethane vapor pressure vs. temperature. Uses formula (with T in kelvins) obtained from CHERIC[2]

Melting point data

Mean value for acceptable data: −183.01 °C (90.14 K).

Sources used, from ONS Open Melting Point Collection:[3]

  • −183.33 °C[4]
  • −182.85 °C from CHERIC[5]
  • −182.78 °C[6]
  • −182.79 °C from PHYSPROP[7]
  • −183.28 °C[8]

Values considered "outliers", not included in averaging:

  • −172 °C from Oxford MSDS[9]
  • −172.15 °C[10]

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. 1522–1524
  2. ↑ "Pure Component Properties" (Queriable database). Chemical Engineering Research Information Center. Retrieved 8 May 2007.
  3. ↑ Bradley, Jean-Claude; Lang, Andrew; Williams, Antony; Curtin, Evan (2011). "ONS Open Melting Point Collection". Nature Precedings. doi:10.1038/npre.2011.6229.1.
  4. ↑ Burnett, Lowell J.; Muller, Burton H. (1970). "Melting points of ethane and three of its deuterated modifications". J. Chem. Eng. Data. 15 (1): 154–157. doi:10.1021/je60044a013.
  5. ↑ "CHERIC". Chemical Engineering Research Information Center. Archived from the original (Queriable database) on 2 August 2002. Retrieved 25 August 2011.
  6. ↑ Givens, F. L.; McCormick, W. D. (1977). "Proton magnetic resonance line shape measurements in solid ethane". J. Chem. Phys. 67 (3): 1150–6. doi:10.1063/1.434967.
  7. ↑ "PHYSPROP" (Queriable database). SRC, Inc. (Syracuse Research Corporation). Retrieved 25 August 2011.
  8. ↑ Witt, R. K.; Kemp, J. D. (1937). "The Heat Capacity of Ethane from 15K. to the Boiling Point. The Heat of Fusion and the Heat of Vaporization". Journal of the American Chemical Society. 59 (2): 273–276. doi:10.1021/ja01281a013.
  9. ↑ "Safety data for ethane" (Queriable database). Oxford University. Retrieved 25 August 2011.
  10. ↑ Streng, A. G. (1971). "Miscibility and compatibility of some liquefied and solidified gases at low temperatures". J. Chem. Eng. Data. 16 (3): 357–359. doi:10.1021/je60050a024.
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