Compound Information 

Name: 1-chloro-1,1-difluoroethane
Formula: C2H3ClF2
Molar Mass: 100.4928064
Additional Names: .alpha.-chloroethylidene difluoride
R-142b
ethane, 1-chloro-1,1-difluoro-
freon 142b
1,1-difluoro-1-chloroethane
Image of 1-chloro-1,1-difluoroethane

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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 (Crystal 1, Liquid, and Gas)
    1 experimental data points
    • Normal boiling temperature (Liquid and Gas)
      • Critical temperature (Liquid and Gas)
        6 experimental data points
        • Critical pressure (Liquid and Gas)
          4 experimental data points
          • Boiling temperature (Liquid in equilibrium with Gas) as a function of Pressure
            Pressure from 0.00363266 kPa to 4055 kPa
            • Phase boundary pressure (Liquid in equilibrium with Gas) as a function of Temperature
              Temperature from 142.72 K to 410.26 K
              50 experimental data points
              • Critical density (Liquid and Gas)
                6 experimental data points
                • Density
                  • Density (Liquid in equilibrium with Gas) as a function of Temperature
                    Temperature from 142.72 K to 410.26 K
                    50 experimental data points
                  • Density (Gas in equilibrium with Liquid) as a function of Temperature
                    Temperature from 142.72 K to 410.26 K
                    36 experimental data points
                  • Density (Gas) as a function of Temperature and Pressure
                    Temperature from 142.72 K to 470 K
                    Pressure from 0.06 kPa to 4050 kPa
                    41 experimental data points
                  • Density (Liquid) as a function of Temperature and Pressure
                    Temperature from 142.72 K to 410.26 K
                    Pressure from 0.06 kPa to 60000 kPa
                    50 experimental data points
                • Isobaric coefficient of expansion
                  • Isobaric coefficient of expansion (Liquid) as a function of Temperature and Pressure
                    Temperature from 142.72 K to 410.26 K
                    Pressure from 0.06 kPa to 60000 kPa
                  • Isobaric coefficient of expansion (Gas) as a function of Temperature and Pressure
                    Temperature from 142.72 K to 470 K
                    Pressure from 0.06 kPa to 4050 kPa
                • Isothermal compressibility
                  • Isothermal compressibility (Liquid) as a function of Temperature and Pressure
                    Temperature from 142.72 K to 410.26 K
                    Pressure from 0.06 kPa to 60000 kPa
                  • Isothermal compressibility (Gas) as a function of Temperature and Pressure
                    Temperature from 142.72 K to 470 K
                    Pressure from 0.06 kPa to 4050 kPa
                • Thermal pressure coefficient
                  • Thermal pressure coefficient (Liquid) as a function of Temperature and Pressure
                    Temperature from 142.72 K to 410.26 K
                    Pressure from 0.06 kPa to 60000 kPa
                  • Thermal pressure coefficient (Gas) as a function of Temperature and Pressure
                    Temperature from 142.72 K to 470 K
                    Pressure from 0.06 kPa to 4050 kPa
                • 2nd virial coefficient (Gas) as a function of Temperature
                  Temperature from 142.72 K to 470 K
                  20 experimental data points
                  • 3rd virial coefficient (Gas) as a function of Temperature
                    Temperature from 142.72 K to 470 K
                    • Enthalpy of vaporization or sublimation (Liquid to Gas) as a function of Temperature
                      Temperature from 142.72 K to 410.26 K
                      • Heat capacity at saturation pressure (Liquid in equilibrium with Gas) as a function of Temperature
                        Temperature from 142.72 K to 410.1 K
                        10 experimental data points
                        • Heat capacity at constant pressure
                          • Heat capacity at constant pressure (Liquid) as a function of Temperature and Pressure
                            Temperature from 142.72 K to 410.26 K
                            Pressure from 0.06 kPa to 60000 kPa
                            50 experimental data points
                          • Heat capacity at constant pressure (Ideal Gas) as a function of Temperature
                            Temperature from 50 K to 1500 K
                          • Heat capacity at constant pressure (Gas) as a function of Temperature and Pressure
                            Temperature from 142.72 K to 470 K
                            Pressure from 0.06 kPa to 4050 kPa
                            9 experimental data points
                        • Enthalpy
                          • Enthalpy (Liquid in equilibrium with Gas) as a function of Temperature
                            Temperature from 142.718 K to 400 K
                          • Enthalpy (Ideal Gas) as a function of Temperature
                            Temperature from 50 K to 1500 K
                        • Entropy
                          • 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 142.72 K to 410.26 K
                        • Adiabatic compressibility
                          • Adiabatic compressibility (Liquid) as a function of Temperature and Pressure
                            Temperature from 142.72 K to 410.26 K
                            Pressure from 0.06 kPa to 60000 kPa
                          • Adiabatic compressibility (Gas) as a function of Temperature and Pressure
                            Temperature from 142.72 K to 470 K
                            Pressure from 0.06 kPa to 4050 kPa
                        • Pressure coefficient of enthalpy (Liquid) as a function of Temperature and Pressure
                          Temperature from 142.72 K to 410.26 K
                          Pressure from 0.06 kPa to 60000 kPa
                          • Joule-Thomson coefficient (Gas) as a function of Temperature and Pressure
                            Temperature from 142.72 K to 470 K
                            Pressure from 0.06 kPa to 4050 kPa
                            • Speed of sound
                              • Speed of sound (Gas) as a function of Temperature and Pressure
                                Temperature from 142.72 K to 470 K
                                Pressure from 0.06 kPa to 4050 kPa
                                50 experimental data points
                              • Speed of sound (Liquid) as a function of Temperature and Pressure
                                Temperature from 142.72 K to 410.26 K
                                Pressure from 0.06 kPa to 60000 kPa
                              • Speed of sound (Liquid in equilibrium with Gas) as a function of Temperature
                                Temperature from 142.72 K to 410.26 K
                              • Speed of sound (Gas in equilibrium with Liquid) as a function of Temperature
                                Temperature from 142.72 K to 410.26 K
                            • Refractive index (Liquid in equilibrium with Gas) as a function of Wavelength and Temperature
                              Temperature from 296.001 K to 383.3 K
                              18 experimental data points
                              • Surface tension (Liquid in equilibrium with Gas) as a function of Temperature
                                Temperature from 142.72 K to 410.26 K
                                • Viscosity
                                  • Viscosity (Liquid in equilibrium with Gas) as a function of Temperature
                                    Temperature from 142.72 K to 410.1 K
                                    39 experimental data points
                                  • Viscosity (Gas) as a function of Temperature and Pressure
                                    Temperature from 142.72 K to 470 K
                                    Pressure from 0.06 kPa to 4050 kPa
                                    47 experimental data points
                                  • Viscosity (Liquid) as a function of Temperature and Pressure
                                    Temperature from 142.72 K to 410.26 K
                                    Pressure from 0.06 kPa to 60000 kPa
                                    39 experimental data points
                                • Thermal conductivity
                                  • Thermal conductivity (Gas) as a function of Temperature and Pressure
                                    Temperature from 142.72 K to 470 K
                                    Pressure from 0.06 kPa to 4050 kPa
                                    47 experimental data points
                                  • Thermal conductivity (Liquid in equilibrium with Gas) as a function of Temperature
                                    Temperature from 142.72 K to 410.1 K
                                    10 experimental data points
                                  • Thermal conductivity (Liquid) as a function of Temperature and Pressure
                                    Temperature from 142.72 K to 410.26 K
                                    Pressure from 0.06 kPa to 60000 kPa
                                    214 experimental data points

                                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.

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                                National Institute of Standards and Technology
                                Gaithersburg MD 20899

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