Ethane (data page)

This page provides supplementary chemical data on ethane.

Material Safety Data Sheet[edit]

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[edit]

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

Thermodynamic properties[edit]

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, Δ_fusH^o	9.76 kJ/mol at −182 °C
Std entropy change of fusion, Δ_fusS^o	6.46 J/(mol·K) at −182 °C
Std enthalpy change of vaporization, Δ_vapH^o crystal I → liquid	14.703 kJ/mol at −89.0 °C
Std entropy change of vaporization, Δ_vapS^o crystal I → liquid	79.87 J/(mol·K) at −89.0 °C
Std enthalpy change of state transition, Δ_trsH^o crystal II → crystal I	2.282 kJ/mol at −183.3 °C
Std entropy change of state transition, Δ_trsS^o crystal II → crystal I	25.48 kJ/mol at −183.3 °C
Solid properties
Std enthalpy change of formation, Δ_fH^o_solid	? kJ/mol
Standard molar entropy, S^o_solid	? J/(mol K)
Heat capacity, c_p	? J/(mol K)
Liquid properties
Std enthalpy change of formation, Δ_fH^o_liquid	? kJ/mol
Standard molar entropy, S^o_liquid	126.7 J/(mol K)
Heat capacity, c_p	68.5 J/(mol K) at −179 °C
Gas properties
Std enthalpy change of formation, Δ_fH^o_gas	−83.8 kJ/mol
Standard molar entropy, S^o_gas	229.6 J/(mol K)
Enthalpy of combustion, Δ_cH^o	−1560.7 kJ/mol
Heat capacity, c_p	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[edit]

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.

Ethane vapor pressure vs. temperature. Uses formula $\ln P_{\text{mm Hg}}=$ $\ln {\frac {760}{101.325}}-5.381564\ln T-{\frac {2626.728}{T}}+46.39131+1.601858\times 10^{-05}T^{2}$ (with T in kelvins) obtained from CHERIC^[2]

Melting point data[edit]

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[edit]

UV-Vis
λ_max	? 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[edit]

^ Lange's Handbook of Chemistry 10th ed, pp. 1522–1524
^ "Pure Component Properties" (Queriable database). Chemical Engineering Research Information Center. Retrieved 8 May 2007.
^ Bradley, Jean-Claude; Lang, Andrew; Williams, Antony; Curtin, Evan (2011). "ONS Open Melting Point Collection". Nature Precedings. doi:10.1038/npre.2011.6229.1.
^ 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.
^ "CHERIC". Chemical Engineering Research Information Center. Archived from the original (Queriable database) on 2 August 2002. Retrieved 25 August 2011.
^ 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.
^ "PHYSPROP" (Queriable database). SRC, Inc. (Syracuse Research Corporation). Retrieved 25 August 2011.
^ 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.
^ "Safety data for ethane" (Queriable database). Oxford University. Retrieved 25 August 2011.
^ 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.

This box:

Except where noted otherwise, data relate to Standard temperature and pressure.
Reliability of data general note.

[lange1522-1] 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.

[Bradley2011-3] Bradley, Jean-Claude; Lang, Andrew; Williams, Antony; Curtin, Evan (2011). "ONS Open Melting Point Collection". Nature Precedings. doi:10.1038/npre.2011.6229.1.

[Burnett1970-4] 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.

[CHERIC-5] "CHERIC". Chemical Engineering Research Information Center. Archived from the original (Queriable database) on 2 August 2002. Retrieved 25 August 2011.

[Givens1977-6] 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.

[PHYSPROP-7] "PHYSPROP" (Queriable database). SRC, Inc. (Syracuse Research Corporation). Retrieved 25 August 2011.

[Witt1937-8] 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.

[OxfordMSDS-9] "Safety data for ethane" (Queriable database). Oxford University. Retrieved 25 August 2011.

[Streng1971-10] 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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