Английская Википедия:Isobutane (data page)
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This page provides supplementary chemical data on isobutane.
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
Шаблон:Chembox header | 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 | 10.3 dyn/cm at 20°C P 300 kPa |
Thermodynamic properties
Шаблон:Chembox header | Phase behavior | |
---|---|
Triple point | 113.55K (–159.6 °C), 0.019481 Pa |
Critical point | 407.7 K (134.6 °C), 3650 kPa |
Std enthalpy change of fusion, ΔfusH |
4.54 kJ/mol |
Std entropy change of fusion, ΔfusS |
39.92 J/(mol·K) |
Std enthalpy change of vaporization, ΔvapH |
21.3 kJ/mol |
Std entropy change of vaporization, ΔvapS |
81.46 J/(mol·K) |
Шаблон:Chembox header | Solid properties | |
Std enthalpy change of formation, ΔfH |
? kJ/mol |
Standard molar entropy, S |
? J/(mol K) |
Heat capacity, cp | ? J/(mol K) |
Шаблон:Chembox header | Liquid properties | |
Std enthalpy change of formation, ΔfH |
? kJ/mol |
Standard molar entropy, S |
200.79 J/(mol K) |
Heat capacity, cp | 129.70 J/(mol K) –253°C to –13°C |
Шаблон:Chembox header | Gas properties | |
Std enthalpy change of formation, ΔfH |
–134.2 kJ/mol |
Standard molar entropy, S |
249.7 J/(mol K) |
Enthalpy of combustion, ΔcH |
–2869 kJ/mol |
Heat capacity, cp | 95.21 J/(mol K) at 20°C |
van der Waals' constants[1] | a = 1304.1 L2 kPa/mol2 b = 0.1142 liter per mole |
Vapor pressure of liquid
Шаблон:Chembox header | P in mm Hg | 1 | 10 | 40 | 100 | 400 | 760 | 1520 | 3800 | 7600 | 15200 | 30400 | 45600 |
Шаблон:Chembox header | T in °C | –109.2 | –86.4 | –68.4 | –54.1 | –27.1 | –11.7 | 7.5 | 39.0 | 68.8 | 99.5 | — | — |
Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.
Spectral data
Шаблон:Chembox header | UV-Vis | |
---|---|
λmax | ? nm |
Extinction coefficient, ε | ? |
Шаблон:Chembox header | IR | |
Major absorption bands | ? cm−1 |
Шаблон:Chembox header | NMR | |
Proton NMR | |
Carbon-13 NMR | |
Other NMR data | |
Шаблон:Chembox header | MS | |
Masses of main fragments |
Шаблон:Chemical data page general note
References
- ↑ Lange's Handbook of Chemistry 10th ed, pp 1522-1524