WTT User's Guide

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.

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.

Table of Contents

  1. About WTT
  2. TRC Thermodynamic Tables - A Short History
  3. Web Application Interface
    1. Searching the Archive
    2. Navigation Tree
    3. Window Workspace
    4. Site Menu Bar
    5. Single-Valued Properties
    6. Specifying Ranges for a Data Table
    7. Data Table Features
    8. Plot Features
    9. Interpreting a Model Summary
    10. The Evaluation Summary
    11. Application Help Window
  4. TDE-SOURCE Archive of Experimental Property Data
  5. Prediction Methods
  6. Uncertainties
  7. Properties and Implemented Models
    1. Vapor Pressure
      1. Wagner25
      2. PVExpansion
      3. REFPROP
    2. Boiling Point
      1. Wagner25
      2. PVExpansion
      3. REFPROP
    3. Sublimation Pressure
      1. PVExpansion
    4. Condensed Phase Boundary Pressure
      1. PolynomialPressure
    5. Density (saturated liquid)
      1. Douslin
      2. PolynomialDensity
      3. REFPROP
    6. Density (saturated vapor)
      1. Douslin
      2. REFPROP
    7. Density (Liquid)
      1. Tait
      2. REFPROP
    8. Density (Gas)
      1. VirialV
      2. REFPROP
    9. Enthalpy of vaporization
      1. Watson
      2. REFPROP
    10. Heat Capacity at Saturation
      1. CSExpansion
      2. PolynomialHC
      3. CubicSpline
      4. REFPROP
    11. Heat Capacity at Constant Pressure
      1. Wilhoit
      2. PolynomialHC
      3. REFPROP
    12. Enthalpy (Condensed Phase)
      1. CSExpansion
      2. PolynomialHC
      3. CubicSpline
      4. REFPROP
    13. Enthalpy (Gas)
      1. Wilhoit
      2. PolynomialHC
      3. REFPROP
    14. Entropy (Condensed Phase)
      1. CSExpansion
      2. PolynomialHC
      3. CubicSpline
      4. REFPROP
    15. Entropy (Gas)
      1. Wilhoit
      2. PolynomialHC
      3. REFPROP
    16. Speed of Sound (Liquid)
      1. RSSLExpansion
      2. REFPROP
    17. Speed of Sound (Gas)
      1. RSSGExpansion
      2. REFPROP
    18. Index of Refraction
      1. RIXExpansion
    19. Surface Tension
      1. ISTExpansion
      2. Yaws.SurfaceTension
      3. PPDS14
      4. REFPROP
    20. Viscosity (Saturated Liquid)
      1. ViscosityL
      2. PPDS9
      3. REFPROP
    21. Viscosity (Gas)
      1. TransportPolynomial
      2. REFPROP
    22. Thermal Conductivity (Saturated Liquid)
      1. TransportPolynomial
      2. REFPROP
    23. Thermal Conductivity (Gas)
      1. TransportPolynomial
      2. REFPROP
    24. Enthalpy of Formation
    25. Other Properties Provided by REFPROP
      1. REFPROP
    26. Single-valued Properties
  8. References
  9. Appendix A: Previous Editions of TRC Thermodynamic Tables

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About WTT