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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)
      1 experimental data points
    • Triple point temperature (Crystal 1, Liquid, and Gas)
      6 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 6.17229 kPa to 4976.24 kPa
          • Phase boundary pressure
            • Phase boundary pressure (Liquid in equilibrium with Gas) as a function of Temperature
              Temperature from 240.956 K to 489.1 K
              26 experimental data points
            • Phase boundary pressure (Crystal 1 in equilibrium with Liquid) as a function of Temperature
              Temperature from 240.956 K to 267.32 K
              10 experimental data points
          • Critical density (Liquid and Gas)
            • Density
              • Density (Liquid in equilibrium with Gas) as a function of Temperature
                Temperature from 240.956 K to 489.1 K
                15 experimental data points
              • Density (Liquid) as a function of Temperature and Pressure
                Temperature from 247.59 K to 293.19 K
                Pressure from 0.1 kPa to 103810 kPa
                50 experimental data points
              • Density (Gas) as a function of Temperature and Pressure
                Temperature from 240 K to 457 K
                Pressure from 0.001 kPa to 1056.54 kPa
              • Density (Gas in equilibrium with Liquid) as a function of Temperature
                Temperature from 392.77 K to 489.1 K
            • Enthalpy of phase transition
              • Enthalpy of phase transition (Crystal 2 to Crystal 1 in equilibrium with Gas)
                1 experimental data points
              • Enthalpy of phase transition (Crystal 1 to Liquid in equilibrium with Gas)
                1 experimental data points
            • Enthalpy of vaporization or sublimation (Liquid to Gas) as a function of Temperature
              Temperature from 240.956 K to 489.1 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 240.956 K to 479.318 K
                  20 experimental data points
                • Heat capacity at saturation pressure (Crystal 2 in equilibrium with Gas) as a function of Temperature
                  Temperature from 0.0002 K to 153.817 K
                  50 experimental data points
                • Heat capacity at saturation pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
                  Temperature from 153.818 K to 240.955 K
                  24 experimental data points
              • Heat capacity at constant pressure (Ideal Gas) as a function of Temperature
                Temperature from 50 K to 3000 K
                • Enthalpy
                  • Enthalpy (Crystal 2 in equilibrium with Gas) as a function of Temperature
                    Temperature from 0.0002 K to 153.817 K
                  • Enthalpy (Crystal 1 in equilibrium with Gas) as a function of Temperature
                    Temperature from 153.818 K to 240.955 K
                  • Enthalpy (Liquid in equilibrium with Gas) as a function of Temperature
                    Temperature from 240.956 K to 479.318 K
                  • Enthalpy (Ideal Gas) as a function of Temperature
                    Temperature from 50 K to 3000 K
                • Entropy
                  • Entropy (Crystal 2 in equilibrium with Gas) as a function of Temperature
                    Temperature from 0.0002 K to 153.817 K
                  • Entropy (Crystal 1 in equilibrium with Gas) as a function of Temperature
                    Temperature from 153.818 K to 240.955 K
                  • Entropy (Liquid in equilibrium with Gas) as a function of Temperature
                    Temperature from 240.956 K to 479.318 K
                    1 experimental data points
                  • Entropy (Ideal Gas) as a function of Temperature and Pressure
                    Temperature from 50 K to 3000 K
                • Refractive index (Liquid in equilibrium with Gas) as a function of Wavelength and Temperature
                  Temperature from 293.138 K to 298.136 K
                  5 experimental data points
                  • Viscosity
                    • Viscosity (Gas) as a function of Temperature and Pressure
                      Temperature from 310 K to 730 K
                    • Viscosity (Liquid in equilibrium with Gas) as a function of Temperature
                      Temperature from 250 K to 480 K
                  • Thermal conductivity
                    • Thermal conductivity (Gas) as a function of Temperature and Pressure
                      Temperature from 310 K to 730 K
                    • Thermal conductivity (Liquid in equilibrium with Gas) as a function of Temperature
                      Temperature from 250 K to 440 K
                  • Enthalpy of formation
                    • Enthalpy of formation (Gas)
                      1 experimental data points
                    • Enthalpy of formation (Liquid)
                   
                   
                   
                   
                   
                   
                   
                   
                  Compound Information 
                   
                   
                   
                   
                   
                  Name: 2-butyne
                  Formula: C4H6
                  Molar Mass: 54.092
                  Additional Names: dimethylacetylene
                  Image of 2-butyne