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Butane (data page)

This page provides supplementary chemical data on n-butane.

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1 Material Safety Data Sheet
2 Structure and properties
3 Thermodynamic properties
4 Vapor pressure of liquid
5 Spectral data
6 References

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, n_D	?
Dielectric constant, ε_r	? ε₀ at ? °C
Symmetry group	C_2h
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?
Surface tension	12.46 dyn/cm at 20°C P ≈ 225 kPa

Thermodynamic properties

Phase behavior
Triple point	134.6 K (–138.5 °C), 0.7 Pa
Critical point	425.1 K (152.0 °C), 3796.0 kPa
Std enthalpy change of fusion, Δ_fusH^o	4.66 kJ/mol
Std entropy change of fusion, Δ_fusS^o	34.56 J/(mol·K)
Std enthalpy change of vaporization, Δ_vapH^o	22.44 kJ/mol
Std entropy change of vaporization, Δ_vapS^o	82.30 J/(mol·K)
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	229.7 J/(mol K)
Heat capacity, c_p	132.42 J/(mol K) –262°C to –3°C
Gas properties
Std enthalpy change of formation, Δ_fH^o_gas	–125.6 kJ/mol
Standard molar entropy, S^o_gas	? J/(mol K)
Enthalpy of combustion, Δ_cH^o	–2877.5 kJ/mol
Heat capacity, c_p	98.49 J/(mol K) at 25°C
n-butane van der Waals' constants^[1]	a = 1466.2 L² kPa/mol² b = 0.1226 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		–101.5	–77.8	–59.1	–44.2	–16.3	–0.5	18.8	50.0	79.5	116.0	—	—

n-Butane: Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.

Spectral data

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

^ Lange's Handbook of Chemistry 10th ed, pp 1522-1524

Multifunctional Green Alternative: Propane and Butane (properties). Seminck. Retrieved on 1 May 2007.

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

Disclaimer applies.

Categories: Chemical data pages | Alkanes

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Butane_(data_page)". A list of authors is available in Wikipedia.

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