Compound Information 

Name: carbon monoxide
Formula: CO
Molar Mass: 28.01
Additional Names: carbon oxide
Image of carbon monoxide

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Property Availability 

For this compound, WTT contains critically evaluated recommendations for:
(Please note that if more than 50 points are used for regression, only the 50 most-constraining points are reported)

  • Triple point temperature
    • Triple point temperature (Crystal 2, Crystal 1, and Gas)
      3 experimental data points
    • Triple point temperature (Crystal 1, Liquid, and Gas)
      18 experimental data points
  • Normal boiling temperature (Liquid and Gas)
    • Critical temperature (Liquid and Gas)
      3 experimental data points
      • Critical pressure (Liquid and Gas)
        5 experimental data points
        • Boiling temperature (Liquid in equilibrium with Gas) as a function of Pressure
          Pressure from 15.5369 kPa to 3494 kPa
          • Phase boundary pressure
            • Phase boundary pressure (Liquid in equilibrium with Gas) as a function of Temperature
              Temperature from 68.16 K to 132.86 K
              50 experimental data points
            • Phase boundary pressure (Crystal 2 in equilibrium with Gas) as a function of Temperature
              Temperature from 53.231 K to 61.546 K
              16 experimental data points
            • Phase boundary pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
              Temperature from 61.546 K to 68.05 K
              23 experimental data points
            • Phase boundary pressure (Crystal 1 in equilibrium with Liquid) as a function of Temperature
              Temperature from 68.05 K to 90.248 K
              39 experimental data points
          • Critical density (Liquid and Gas)
            1 experimental data points
            • Density
              • Density (Liquid in equilibrium with Gas) as a function of Temperature
                Temperature from 68.16 K to 132.86 K
                50 experimental data points
              • Density (Gas in equilibrium with Liquid) as a function of Temperature
                Temperature from 68.16 K to 132.86 K
                50 experimental data points
              • Density (Liquid) as a function of Temperature and Pressure
                Temperature from 68.16 K to 132.9 K
                Pressure from 0.1 kPa to 100000 kPa
                50 experimental data points
              • Density (Gas) as a function of Temperature and Pressure
                Temperature from 68.16 K to 500 K
                Pressure from 0.1 kPa to 3498 kPa
                50 experimental data points
            • Isobaric coefficient of expansion
              • Isobaric coefficient of expansion (Liquid) as a function of Temperature and Pressure
                Temperature from 68.16 K to 132.9 K
                Pressure from 0.1 kPa to 100000 kPa
              • Isobaric coefficient of expansion (Gas) as a function of Temperature and Pressure
                Temperature from 68.16 K to 500 K
                Pressure from 0.1 kPa to 3498 kPa
            • Isothermal compressibility
              • Isothermal compressibility (Liquid) as a function of Temperature and Pressure
                Temperature from 68.16 K to 132.9 K
                Pressure from 0.1 kPa to 100000 kPa
              • Isothermal compressibility (Gas) as a function of Temperature and Pressure
                Temperature from 68.16 K to 500 K
                Pressure from 0.1 kPa to 3498 kPa
            • Thermal pressure coefficient
              • Thermal pressure coefficient (Liquid) as a function of Temperature and Pressure
                Temperature from 68.16 K to 132.9 K
                Pressure from 0.1 kPa to 100000 kPa
              • Thermal pressure coefficient (Gas) as a function of Temperature and Pressure
                Temperature from 68.16 K to 500 K
                Pressure from 0.1 kPa to 3498 kPa
            • 2nd virial coefficient (Gas) as a function of Temperature
              Temperature from 68.16 K to 500 K
              50 experimental data points
              • 3rd virial coefficient (Gas) as a function of Temperature
                Temperature from 68.16 K to 500 K
                • Enthalpy of phase transition
                  • Enthalpy of phase transition (Crystal 2 to Crystal 1 in equilibrium with Gas)
                    3 experimental data points
                  • Enthalpy of phase transition (Crystal 1 to Liquid in equilibrium with Gas)
                    3 experimental data points
                • Enthalpy of vaporization or sublimation
                  • Enthalpy of vaporization or sublimation (Liquid to Gas) as a function of Temperature
                    Temperature from 68.16 K to 132.86 K
                    3 experimental data points
                  • Enthalpy of vaporization or sublimation (Crystal 1 to Gas) as a function of Temperature
                    Temperature from 61.546 K to 68.05 K
                • Heat capacity at saturation pressure
                  • Heat capacity at saturation pressure (Liquid in equilibrium with Gas) as a function of Temperature
                    Temperature from 68.16 K to 132.7 K
                    14 experimental data points
                  • Heat capacity at saturation pressure (Crystal 2 in equilibrium with Gas) as a function of Temperature
                    Temperature from 5 K to 61.546 K
                    50 experimental data points
                  • Heat capacity at saturation pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
                    Temperature from 61.546 K to 68.05 K
                    8 experimental data points
                • Heat capacity at constant pressure
                  • Heat capacity at constant pressure (Liquid) as a function of Temperature and Pressure
                    Temperature from 68.16 K to 132.9 K
                    Pressure from 0.1 kPa to 100000 kPa
                    14 experimental data points
                  • Heat capacity at constant pressure (Ideal Gas) as a function of Temperature
                    Temperature from 50 K to 5000 K
                  • Heat capacity at constant pressure (Gas) as a function of Temperature and Pressure
                    Temperature from 68.16 K to 500 K
                    Pressure from 0.1 kPa to 3498 kPa
                    2 experimental data points
                • Enthalpy
                  • Enthalpy (Crystal 1 in equilibrium with Gas) as a function of Temperature
                    Temperature from 61.546 K to 68.05 K
                  • Enthalpy (Liquid in equilibrium with Gas) as a function of Temperature
                    Temperature from 68.05 K to 80.61 K
                  • Enthalpy (Ideal Gas) as a function of Temperature
                    Temperature from 50 K to 5000 K
                • Entropy
                  • Entropy (Ideal Gas) as a function of Temperature and Pressure
                    Temperature from 50 K to 5000 K
                  • Entropy (Liquid in equilibrium with Gas) as a function of Temperature
                    Temperature from 68.16 K to 132.86 K
                • Adiabatic compressibility
                  • Adiabatic compressibility (Liquid) as a function of Temperature and Pressure
                    Temperature from 68.16 K to 132.9 K
                    Pressure from 0.1 kPa to 100000 kPa
                  • Adiabatic compressibility (Gas) as a function of Temperature and Pressure
                    Temperature from 68.16 K to 500 K
                    Pressure from 0.1 kPa to 3498 kPa
                • Pressure coefficient of enthalpy (Liquid) as a function of Temperature and Pressure
                  Temperature from 68.16 K to 132.9 K
                  Pressure from 0.1 kPa to 100000 kPa
                  • Joule-Thomson coefficient (Gas) as a function of Temperature and Pressure
                    Temperature from 68.16 K to 500 K
                    Pressure from 0.1 kPa to 3498 kPa
                    • Speed of sound
                      • Speed of sound (Gas) as a function of Temperature and Pressure
                        Temperature from 68.16 K to 500 K
                        Pressure from 0.1 kPa to 3498 kPa
                        50 experimental data points
                      • Speed of sound (Liquid) as a function of Temperature and Pressure
                        Temperature from 68.16 K to 132.9 K
                        Pressure from 0.1 kPa to 100000 kPa
                      • Speed of sound (Liquid in equilibrium with Gas) as a function of Temperature
                        Temperature from 68.16 K to 132.86 K
                      • Speed of sound (Gas in equilibrium with Liquid) as a function of Temperature
                        Temperature from 68.16 K to 132.86 K
                    • Surface tension (Liquid in equilibrium with Gas) as a function of Temperature
                      Temperature from 68.16 K to 132.86 K
                      10 experimental data points
                      • Viscosity
                        • Viscosity (Liquid) as a function of Temperature and Pressure
                          Temperature from 68.16 K to 132.859 K
                          Pressure from 0.1 kPa to 100000 kPa
                        • Viscosity (Liquid in equilibrium with Gas) as a function of Temperature
                          Temperature from 68.16 K to 132.7 K
                        • Viscosity (Gas) as a function of Temperature and Pressure
                          Temperature from 68.16 K to 500 K
                          Pressure from 0.1 kPa to 3498 kPa
                      • Thermal conductivity
                        • Thermal conductivity (Gas) as a function of Temperature and Pressure
                          Temperature from 68.16 K to 500 K
                          Pressure from 0.1 kPa to 3498 kPa
                        • Thermal conductivity (Liquid) as a function of Temperature and Pressure
                          Temperature from 68.16 K to 132.859 K
                          Pressure from 0.1 kPa to 100000 kPa
                        • Thermal conductivity (Liquid in equilibrium with Gas) as a function of Temperature
                          Temperature from 68.16 K to 132.7 K

                      About WTT 

                      NIST/TRC Web Thermo Tables (WTT)
                      NIST Standard Reference Subscription Database 3 - Professional Edition
                      Version 2-2012-1-Pro

                      This web application provides access to a collection of critically evaluated thermodynamic property data for pure compounds with a primary focus on organics. These data were generated through dynamic data analysis, as implemented in the NIST ThermoData Engine software package [1, 2, 3, 4, 5, 6]. Some critically evaluated data from the historical TRC Thermodynamic Tables archive [7, 8] are included, also. As of May 2012, the Professional Edition contains information on 28432 compounds and total of 531486 evaluated data points. The properties covered by both versions (32 total) are described in Properties and Implemented Models.

                      Developed by Kenneth Kroenlein, Chris D. Muzny, Andrei F. Kazakov, Vladimir Diky, Robert D. Chirico, Joseph W. Magee, Ilmutdin Abdulagatov and Michael Frenkel.

                      Thermodynamics Research Center (TRC)
                      Thermophysical Properties Division
                      National Institute of Standards and Technology
                      Boulder CO 80305-3337

                      Questions and comments should be addressed to Dr. Michael Frenkel .

                      DISCLAIMER: The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high-quality copy of the database and to verify that the methods and data contained therein have been selected on the basis of sound scientific judgement. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the program and database.

                      Distributed by:
                      Standard Reference Data Program
                      National Institute of Standards and Technology
                      Gaithersburg MD 20899

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