Ethane (data page)

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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 liter per mole

Vapor pressure of liquid

P in mm Hg 1 10 40 100 400 760 1520 3800 7600 15200 30400 45600
T in °C –159.5 –142.9 –129.8 –119.3 –99.6 –88.6 –75.0 –52.8 –32.0 –6.4 23.6  —

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

File:LogEthaneVaporPressure.png
log10 of Ethane vapor pressure. Uses formula \(\scriptstyle \log_e P_{mmHg} = \)\( \scriptstyle \log_e (\frac {760} {101.325}) - 5.381564 \log_e(T+273.15) - \frac {2626.728} {T+273.15} + 1.601858 \times 10^{-05}(T+273.15)^2\) 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. http://www.cheric.org/research/kdb/hcprop/cmpsrch.php. Retrieved 8 May 2007.
  3. ↑ "ONS Open Melting Point Collection". 2011. doi:10.1038/npre.2011.6229.1. http://precedings.nature.com/documents/6229/version/1.
  4. ↑ Script error
  5. ↑ "CHERIC" (Queriable database). Chemical Engineering Research Information Center. http://www.cheric.org/kdb/kdb/hcprop/showprop.php?cmpid=2. Retrieved 25 August 2011.
  6. ↑ Script error
  7. ↑ "PHYSPROP" (Queriable database). SRC, Inc. (Syracuse Research Corporation). http://www.srcinc.com/what-we-do/product.aspx?id=133. Retrieved 25 August 2011.
  8. ↑ Script error
  9. ↑ "Safety data for ethane" (Queriable database). Oxford University. http://msds.chem.ox.ac.uk/ET/ethane.html. Retrieved 25 August 2011.
  10. ↑ Script error

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

Disclaimer applies.


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