7.7.5. DATA NASA Input Format

This is an example of the minimum input required to fit NASA-format data, which is at least four columns consisting of temperature (K), and species properties C p (cal/mole-K), H (T) - H (298) (kcal/mole), and (cal/mole-K). NASA data can be obtained from the Properties From Coefficients (PFC) [9] program; request calorie-based units, and highlight, copy, and paste the resulting table into a text file. Defaults are PHAS=G , TMIN=300, TMAX=6000, the first and last positive data points, and H298 is the column 6 value at T=298.15, but keywords may be used to supersede the defaults.

Figure 7.6: DATA NASA Input File

SPEC OH
ELEM O 1
ELEM H 1
DATA NASA
!   THERMODYNAMIC FUNCTIONS CALCULATED FROM COEFFICIENTS FOR OH              
!      T         Cp        H-H298        S      -(G-H298)/T      H        delta Hf     log K
!    deg-K   cal/mol-K    kcal/mol   cal/mol-K   cal/mol-K    kcal/mol    kcal/mol
      0        0.         -2.106       0.        INFINITE      6.803       8.853    INFINITE
     200       7.293      -0.707      41.035      44.572       8.202       8.877     -8.9035
     298.15    7.143       0.000      43.915      43.915       8.910   
        :
        :
    5900       9.620      48.463      67.672      59.458      57.373       6.636      0.3749
    6000       9.625      49.425      67.834      59.596      58.335       6.573      0.3790
END