Ethylene (data page)

This page provides supplementary chemical data on ethylene.

Structure and properties

Structure and properties
Index of refraction	?
Dielectric constant	? ε0 at ? °C
Bond strength	?
Bond length	C-C 133pm C-H 108 pm
Bond angle	121.7
Magnetic susceptibility	?

Thermodynamic properties

Phase behavior
Triple point	104 K (−169 °C), 120 Pa
Critical point	282.5 K (9.4 °C), 50.6 bar
Std enthalpy change of fusion, ΔfusHo	+3.35 kJ/mol
Std entropy change of fusion, ΔfusSo	+32.2 J/(mol·K)
Std enthalpy change of vaporization, ΔvapHo	+13.5 kJ/mol
Std entropy change of vaporization, ΔvapSo	? J/(mol·K)
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	117.8 J/(mol K)
Heat capacity, cp	67.4 J/(mol K)
Gas properties
Std enthalpy change of formation, ΔfHogas	+52.47 kJ/mol
Standard molar entropy, Sogas	219.32 J/(mol K)
Enthalpy of combustion, ΔcHo	–1387.4 kJ/mol
Heat capacity, cp	42.9 J/(mol K)
van der Waals' constants	a = 453.02 L2 kPa/mol2 b = 0.05714 liter per mole

Vapor pressure of liquid

P in mmHg		1	10	40	100	400	760	1520	3800	7600	15200	30400
T in °C		–168.3	–153.2	–141.3	–131.8	–113.9	–103.7	–90.8	–71.1	–52.8	–29.1	–1.5	—

Table data obtained from CRC Handbook of Chemistry and Physics, 44th ed.

log₁₀ of ethylene vapor pressure. Uses formula: $\scriptstyle \log _{10}P_{mmHg}=6.74756-{\frac {585.00}{255.00+T}}$, obtained from Lange's Handbook of Chemistry, 10th ed.

Spectral data

UV-Vis
λmax	? nm
Extinction coefficient, ε	?
IR
Major absorption bands	974 cm−1
NMR
Proton NMR
Carbon-13 NMR
Other NMR data
MS
Masses of main fragments

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.

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

References

• NIST Standard Reference Database