Ethane (data page)

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This page provides supplementary chemical data on ethane.

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
Surface tension 21.16 dyn/cm at −119.9 °C

Thermodynamic properties

Phase behavior
Triple point 91 K (−182 °C), 1.1 Pa
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

Spectral data

References

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