Carbon monoxide (data page) explained

This page provides supplementary chemical data on carbon monoxide.

Material safety data sheet

The handling of this chemical may incur notable safety precautions. It is highly recommended that you seek the material safety data sheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions.

Structure and properties

Structure and properties
Index of refraction, nD1.0003364
?
Dielectric constant, εr? ε0 at ? °C
Bond strength1850 N/m
Bond length0.111 nm
Bond energy1079 kJ/mol
Bond angleLinear
Magnetic susceptibility?

Thermodynamic properties

Phase behavior
Triple point67.9 K (−205.1 °C), 15.35 kPa
Critical point132.7 K (−140.3 °C), 3498 kPa, 11.1 mol/L (3.1×102 kg/m3)
Std enthalpy change
of fusion, ΔfusHo		? kJ/mol
Std entropy change
of fusion, ΔfusSo		? J/(mol K)
Std enthalpy change
of vaporization, ΔvapHo		? kJ/mol
Std entropy change
of vaporization, ΔvapSo		? J/(mol K)
Std enthalpy change
of sublimation, ΔsubHo		8 kJ/mol (at 51–68 K)
Std entropy change
of sublimation, ΔsubSo		? J/(mol·K)
Solid properties
Std enthalpy change
of formation, ΔfHosolid		−110.5 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		? J/(mol K)
Heat capacity, cp? J/(mol K)
Gas properties
Std enthalpy change
of formation, ΔfHogas		−110.53 kJ/mol
Std enthalpy change
of combustion, ΔcHogas		−283.0 kJ/mol
Standard molar entropy,
Sogas		197.66 J/(mol K)
Heat capacity, cp29 J/(mol K)

Spectral data

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UV-Vis
λmax55 nm
Extinction coefficient, ε?
IR
Major absorption bands2143 cm-1
13CO2099.2 ± 4 cm-1
NMR
 
 
Other NMR data  
MS
Masses of
main fragments