Ethane (data page)

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 tension21.16 dyn/cm at −119.9 °C

Thermodynamic properties

Phase behavior
Triple point91 K (−182 °C), 1.1 Pa
Critical point305.3 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, cp68.5 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, cp52.49 J/(mol K) at 25 °C
van der Waals' constantsa = 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

Melting point data

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

Sources used, from ONS Open Melting Point Collection:

  • −183.33 °C
  • −182.85 °C from CHERIC
  • −182.78 °C
  • −182.79 °C from PHYSPROP
  • −183.28 °C

Values considered "outliers", not included in averaging:

  • −172 °C from Oxford MSDS
  • −172.15 °C

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

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Uses material from the Wikipedia article Ethane (data page), released under the CC BY-SA 4.0 license.