Compound Information 

Name: freon 122a
Formula: C2HCl3F2
Molar Mass: 169.3768064
Additional Names: ethane, 1,1,2-trichloro-1,2-difluoro-
1,1,2-trichloro-1,2-difluoroethane
Image of freon 122a

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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 (Glass, Liquid, and Gas)
      1 experimental data points
    • Triple point temperature (Crystal 1, Liquid, and Gas)
      1 experimental data points
  • Normal boiling temperature (Liquid and Gas)
    • Critical temperature (Liquid and Gas)
      • Critical pressure (Liquid and Gas)
        • Boiling temperature (Liquid in equilibrium with Gas) as a function of Pressure
          Pressure from 3.76032e-014 kPa to 3697.75 kPa
          • Phase boundary pressure (Liquid in equilibrium with Gas) as a function of Temperature
            Temperature from 99 K to 531 K
            17 experimental data points
            • Critical density (Liquid and Gas)
              • Density
                • Density (Liquid in equilibrium with Gas) as a function of Temperature
                  Temperature from 99 K to 531 K
                  4 experimental data points
                • Density (Gas) as a function of Temperature and Pressure
                  Temperature from 260 K to 499 K
                  Pressure from 0.0007 kPa to 742.427 kPa
                • Density (Gas in equilibrium with Liquid) as a function of Temperature
                  Temperature from 426.331 K to 531 K
              • Enthalpy of vaporization or sublimation (Liquid to Gas) as a function of Temperature
                Temperature from 99 K to 531 K
                1 experimental data points
                • Heat capacity at saturation pressure
                  • Heat capacity at saturation pressure (Liquid in equilibrium with Gas) as a function of Temperature
                    Temperature from 99 K to 520 K
                    50 experimental data points
                  • Heat capacity at saturation pressure (Glass in equilibrium with Gas) as a function of Temperature
                    Temperature from 14 K to 99 K
                    39 experimental data points
                • Heat capacity at constant pressure (Ideal Gas) as a function of Temperature
                  Temperature from 50 K to 1500 K
                  • Enthalpy
                    • Enthalpy (Glass in equilibrium with Gas) as a function of Temperature
                      Temperature from 14 K to 99 K
                    • Enthalpy (Liquid in equilibrium with Gas) as a function of Temperature
                      Temperature from 99 K to 520 K
                    • Enthalpy (Ideal Gas) as a function of Temperature
                      Temperature from 50 K to 1500 K
                  • Entropy
                    • Entropy (Glass in equilibrium with Gas) as a function of Temperature
                      Temperature from 14 K to 99 K
                    • Entropy (Ideal Gas) as a function of Temperature and Pressure
                      Temperature from 50 K to 1500 K
                    • Entropy (Liquid in equilibrium with Gas) as a function of Temperature
                      Temperature from 99 K to 520 K
                  • Viscosity
                    • Viscosity (Gas) as a function of Temperature and Pressure
                      Temperature from 350 K to 790 K
                    • Viscosity (Liquid in equilibrium with Gas) as a function of Temperature
                      Temperature from 250 K to 530 K
                  • Thermal conductivity
                    • Thermal conductivity (Gas) as a function of Temperature and Pressure
                      Temperature from 350 K to 790 K
                    • Thermal conductivity (Liquid in equilibrium with Gas) as a function of Temperature
                      Temperature from 100 K to 470 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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