3-ethylpentane -- Critically Evaluated Thermophysical Property Data from NIST/TRC Web Thermo Tables (WTT) (2024)

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)
  14 experimental data points
• Normal boiling temperature (Liquid and Gas)
• Critical temperature (Liquid and Gas)
  2 experimental data points
• Critical pressure (Liquid and Gas)
  2 experimental data points
• Boiling temperature (Liquid in equilibrium with Gas) as a function of Pressure
  Pressure from 2.10618e-006 kPa to 2900.27 kPa
• Phase boundary pressure (Liquid in equilibrium with Gas) as a function of Temperature
  Temperature from 154.599 K to 540.667 K
  44 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 154.599 K to 540.667 K
    50 experimental data points
  • Density (Liquid) as a function of Temperature and Pressure
    Temperature from 297.995 K to 352.979 K
    Pressure from 0.2 kPa to 196133 kPa
    45 experimental data points
  • Density (Gas in equilibrium with Liquid) as a function of Temperature
    Temperature from 434.075 K to 540.667 K
    8 experimental data points
  • Density (Gas) as a function of Temperature and Pressure
    Temperature from 270 K to 540 K
    Pressure from 0.0005 kPa to 518.122 kPa
    7 experimental data points
• Enthalpy of phase transition (Crystal 1 to Liquid in equilibrium with Gas)
  4 experimental data points
• Enthalpy of vaporization or sublimation (Liquid to Gas) as a function of Temperature
  Temperature from 154.599 K to 540.667 K
  8 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 154.599 K to 529.853 K
    37 experimental data points
  • Heat capacity at saturation pressure (Crystal 1 in equilibrium with Gas) as a function of Temperature
    Temperature from 0.0002 K to 154.598 K
    50 experimental data points
• Heat capacity at constant pressure (Ideal Gas) as a function of Temperature
  Temperature from 200 K to 1500 K
• Enthalpy
  • Enthalpy (Crystal 1 in equilibrium with Gas) as a function of Temperature
    Temperature from 0.0002 K to 154.598 K
  • Enthalpy (Liquid in equilibrium with Gas) as a function of Temperature
    Temperature from 154.599 K to 529.853 K
  • Enthalpy (Ideal Gas) as a function of Temperature
    Temperature from 200 K to 1500 K
• Entropy
  • Entropy (Crystal 1 in equilibrium with Gas) as a function of Temperature
    Temperature from 0.0002 K to 154.598 K
    20 experimental data points
  • Entropy (Liquid in equilibrium with Gas) as a function of Temperature
    Temperature from 154.599 K to 529.853 K
    18 experimental data points
  • Entropy (Ideal Gas) as a function of Temperature and Pressure
    Temperature from 200 K to 1500 K
• Refractive index (Liquid) as a function of Wavelength, Temperature, and Pressure
  Wavelength from 434.05 nm to 667.82 nm
  Temperature from 276.748 K to 303.134 K
  50 experimental data points
• Viscosity
  • Viscosity (Gas) as a function of Temperature and Pressure
    Temperature from 372.975 K to 810 K
    11 experimental data points
  • Viscosity (Liquid in equilibrium with Gas) as a function of Temperature
    Temperature from 292.989 K to 540 K
    7 experimental data points
• Thermal conductivity
  • Thermal conductivity (Liquid in equilibrium with Gas) as a function of Temperature
    Temperature from 19.9979 K to 480 K
    34 experimental data points
  • Thermal conductivity (Gas) as a function of Temperature and Pressure
    Temperature from 370 K to 810 K
• Enthalpy of formation
  • Enthalpy of formation (Gas)
  • Enthalpy of formation (Liquid)
    2 experimental data points

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

This web application provides access toa 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 theNIST ThermoData Engine software package[1, 2, 3, 4, 5, 6].Some critically evaluated datafrom the historicalTRC 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 itsbest efforts to deliver a high-quality copy of the database and to verify that themethods and data contained therein have been selected on the basis of soundscientific judgement. However, NIST makes no warranties to that effect, and NISTshall not be liable for any damage that may result from errors or omissions inthe program and database.

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

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