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Sample Chemkin/EQUIL calculation:
Input:
Pressure = 1 atm
Temp = 300K
Reactant: CH4 1.0
Reactant: O2 2.0
Constant Pressure and Enthalpy
Checked box to include COMBUSTION-SET-1

Output:

        **************************************************************
        *               CHEMKIN Collection Release 3.7               *
        *                      CHEM Application                      *
        *              GAS-PHASE MECHANISM INTERPRETER               *
        * Copyright 1997-2002 Reaction Design.  All Rights Reserved. *
        **************************************************************


                          --------------------
                          ELEMENTS     ATOMIC
                          CONSIDERED   WEIGHT
                          --------------------
                           1. C       12.0112
                           2. H       1.00797
                           3. O       15.9994
                          --------------------
 -------------------------------------------------------------------------------
                           C
                        P  H
                        H  A
                        A  R
  SPECIES               S  G  MOLECULAR  TEMPERATURE  ELEMENT COUNT
  CONSIDERED            E  E  WEIGHT     LOW    HIGH  C  H  O
 --------------------------------------------------------------  NAME
   1.H2CCHO_2A"         G  0   43.04561   300   4000   2  3  1  H2CCHO 2A"
   2.H2CCOH_HOCC_CIS    G  0   43.04561   300   4000   2  3  1  H2CCOH HOCC CIS
   3.CH3CO_HCCO_CIS_2   G  0   43.04561   300   4000   2  3  1  CH3CO HCCO CIS 2A'
   4.CH2CHCCH2_CS       G  0   53.08445   300   4000   4  5  0  CH2CHCCH2 CS
   5.H2CCCCH            G  0   51.06851   300   4000   4  3  0  H2CCCCH
   6.HCCHCCH_HCCH_CIS   G  0   51.06851   300   4000   4  3  0  HCCHCCH HCCH CIS
   7.C5H6_CYCLOPENTAD   G  0   66.10357   300   4000   5  6  0  C5H6 CYCLOPENTADIENE
   8.C5H5_CYCLOPENTAD   G  0   65.09560   300   4000   5  5  0  C5H5 CYCLOPENTADIENYL
   9.CH2CHCHCH_2A'_CC   G  0   53.08445   300   4000   4  5  0  CH2CHCHCH 2A' CCCC TRANS HCCH CIS
  10.C6H7_2B1           G  0   79.12269   300   4000   6  7  0  C6H7 2B1
  11.HCCCH_3B           G  0   38.04939   300   4000   3  2  0  HCCCH 3B
  12.C5H3_H2CCCCCH_2A   G  0   63.07966   300   4000   5  3  0  C5H3 H2CCCCCH 2A'
  13.C5H3_2B1_HCCCHCC   G  0   63.07966   300   4000   5  3  0  C5H3 2B1 HCCCHCCH
  14.HCCOH_ETHYNOL      G  0   42.03764   300   4000   2  2  1  HCCOH ETHYNOL
  15.C6H6_METHYLENE-C   G  0   78.11472   300   4000   6  6  0  C6H6 METHYLENE-CYCLOPENTADIENE
  16.C6H5OH             G  0   94.11412   300   4000   6  6  1  C6H5OH
  17.C6H5O_PHENOXY      G  0   93.10615   300   4000   6  5  1  C6H5O PHENOXY
  18.ORTHO-BENZYNE,_1   G  0   76.09878   300   4000   6  4  0  ORTHO-BENZYNE, 1A1
  19.C6H5               G  0   77.10675   300   4000   6  5  0  C6H5
  20.CH3CHCH_PROP-1-E   G  0   41.07330   300   4000   3  5  0  CH3CHCH PROP-1-ENYL HC=CH CIS 2A'
  21.CH2CHCH2_PROP-2-   G  0   41.07330   300   4000   3  5  0  CH2CHCH2 PROP-2-ENYL C2v 2A2
  22.CH3CCH2_1-METHYL   G  0   41.07330   300   4000   3  5  0  CH3CCH2 1-METHYL-ETHENYL CS 2A'
  23.H2CCCH_2-PROPYNY   G  0   39.05736   300   4000   3  3  0  H2CCCH 2-PROPYNYL C2v 2B2
  24.HCCH               G  0   26.03824   300   4000   2  2  0  HCCH
  25.C2H4               G  0   28.05418   300   4000   2  4  0  C2H4
  26.CH3CHO_HCCO_cis    G  0   44.05358   300   4000   2  4  1  CH3CHO HCCO CIS
  27.CH3CH2OO_CCOO_tr   G  0   61.06095   300   4000   2  5  2  CH3CH2OO CCOO TRANS
  28.CH2_singlet        G  0   14.02709   300   4000   1  2  0  CH2 SINGLET
  29.CH4                G  0   16.04303   300   4000   1  4  0  CH4
  30.CO2                G  0   44.00995   300   4000   1  0  2  CO2
  31.CH3OO_2A"_HCOO_T   G  0   47.03386   300   4000   1  3  2  CH3OO 2A" HCOO TRANS
  32.CH2CCH2_3A2_C2V    G  0   40.06533   300   4000   3  4  0  CH2CCH2 3A2 C2v PLANAR
  33.CH2_3B1            G  0   14.02709   300   4000   1  2  0  CH2 3B1
  34.h_2s               G  0    1.00797   300   4000   0  1  0  H 2s
  35.C_3P               G  0   12.01115   300   4000   1  0  0  C 3P
  36.O_3P               G  0   15.99940   300   4000   0  0  1  O 3P
  37.H20                G  0   18.01534   300   4000   0  2  1  HOH
  38.HOO_2A"            G  0   33.00677   300   4000   0  1  2  HOO 2A"
  39.H2                 G  0    2.01594   300   4000   0  2  0  H2
  40.CH3                G  0   15.03506   300   4000   1  3  0  CH3
  41.HCO                G  0   29.01852   300   4000   1  1  1  HCO
  42.C2_3PIU            G  0   24.02230   300   4000   2  0  0  C2 3PIU
  43.O2_3SIG-           G  0   31.99880   300   4000   0  0  2  O2 3SIG-
  44.C2H5               G  0   29.06215   300   4000   2  5  0  C2H5
  45.C2H3               G  0   27.04621   300   4000   2  3  0  C2H3
  46.H3CCCH             G  0   40.06533   300   4000   3  4  0  H3CCCH
  47.CH3CHCH2_HCCC_CI   G  0   42.08127   300   4000   3  6  0  CH3CHCH2 HCCC CIS
  48.HCCCCH             G  0   50.06054   300   4000   4  2  0  HCCCCH
  49.CH2CHCCH_BUT-1-Y   G  0   52.07648   300   4000   4  4  0  CH2CHCCH BUT-1-YN-3-ENE PLANAR CS
  50.CH2CHCHCH2_TRANS   G  0   54.09242   300   4000   4  6  0  CH2CHCHCH2 TRANS-1,3-BUTADIENE C2h
  51.C2H6_STAGGERED_S   G  0   30.07012   300   4000   2  6  0  C2H6 STAGGERED Sig. = 6
  52.HOOH               G  0   34.01474   300   4000   0  2  2  HOOH
  53.CH3OH_TRANS        G  0   32.04243   300   4000   1  4  1  CH3OH TRANS
  54.CH3OOH_STAGGERED   G  0   48.04183   300   4000   1  4  2  CH3OOH STAGGERED
  55.O=CH-CH=O_GLYOXA   G  0   58.03704   300   4000   2  2  2  O=CH-CH=O GLYOXAL TRANSS C2v
  56.BUTADIENONE,_C2V   G  0   66.05994   300   4000   4  2  1  BUTADIENONE, C2V
  57.H2CO               G  0   30.02649   300   4000   1  2  1  H2CO
  58.HCCO_2A"           G  0   41.02967   300   4000   2  1  1  HCCO 2A"
  59.C2O_TRIPLET        G  0   40.02170   300   4000   2  0  1  C2O TRIPLET
  60.H2COH              G  0   31.03446   300   4000   1  3  1  H2COH
  61.oh                 G  0   17.00737   300   4000   0  1  1  OH
  62.c2h_2sig+          G  0   25.03027   300   4000   2  1  0  C2H 2SIG+
  63.ch2co_ketene       G  0   42.03764   300   4000   2  2  1  CH2CO ketene
  64.CO                 G  0   28.01055   300   4000   1  0  1  CO
 -------------------------------------------------------------------------------



 NO ERRORS FOUND ON INPUT:

 WORKING SPACE REQUIREMENTS ARE
    INTEGER:      577
    REAL:        1548
    CHARACTER:     67

 Total CPUtime: Less than 1 second


        **************************************************************
        *               CHEMKIN Collection Release 3.7               *
        *                     EQUIL Application                      *
        *               CHEMKIN INTERFACE FOR STANJAN                *
        * Copyright 1997-2002 Reaction Design.  All Rights Reserved. *
        **************************************************************



                WORKING SPACE REQUIREMENTS
                 PROVIDED        REQUIRED
 INTEGER            14494          14494
 REAL               70670          70670
 CHARACTER            199            199


Initializing CHEMKIN Gas-phase Library, a component of CHEMKIN Release 3.7.
This and All Other CHEMKIN Libraries are Copyright (C) 1997-2002 Reaction Design.


           KEYWORD INPUT

 REAC H2CCHO_2A"          0
 REAC H2CCOH_HOCC_CIS     0
 REAC CH3CO_HCCO_CIS_2    0
 REAC CH2CHCCH2_CS        0
 REAC H2CCCCH             0
 REAC HCCHCCH_HCCH_CIS    0
 REAC C5H6_CYCLOPENTAD    0
 REAC C5H5_CYCLOPENTAD    0
 REAC CH2CHCHCH_2A'_CC    0
 REAC C6H7_2B1            0
 REAC HCCCH_3B            0
 REAC C5H3_H2CCCCCH_2A    0
 REAC C5H3_2B1_HCCCHCC    0
 REAC HCCOH_ETHYNOL       0
 REAC C6H6_METHYLENE-C    0
 REAC C6H5OH              0
 REAC C6H5O_PHENOXY       0
 REAC ORTHO-BENZYNE,_1    0
 REAC C6H5                0
 REAC CH3CHCH_PROP-1-E    0
 REAC CH2CHCH2_PROP-2-    0
 REAC CH3CCH2_1-METHYL    0
 REAC H2CCCH_2-PROPYNY    0
 REAC HCCH                0
 REAC C2H4                0
 REAC CH3CHO_HCCO_cis     0
 REAC CH3CH2OO_CCOO_tr    0
 REAC CH2_singlet         0
 REAC CH4                 1.0
 REAC CO2                 0
 REAC CH3OO_2A"_HCOO_T    0
 REAC CH2CCH2_3A2_C2V     0
 REAC CH2_3B1             0
 REAC h_2s                0
 REAC C_3P                0
 REAC O_3P                0
 REAC H20                 0
 REAC HOO_2A"             0
 REAC H2                  0
 REAC CH3                 0
 REAC HCO                 0
 REAC C2_3PIU             0
 REAC O2_3SIG-            2.0
 REAC C2H5                0
 REAC C2H3                0
 REAC H3CCCH              0
 REAC CH3CHCH2_HCCC_CI    0
 REAC HCCCCH              0
 REAC CH2CHCCH_BUT-1-Y    0
 REAC CH2CHCHCH2_TRANS    0
 REAC C2H6_STAGGERED_S    0
 REAC HOOH                0
 REAC CH3OH_TRANS         0
 REAC CH3OOH_STAGGERED    0
 REAC O=CH-CH=O_GLYOXA    0
 REAC BUTADIENONE,_C2V    0
 REAC H2CO                0
 REAC HCCO_2A"            0
 REAC C2O_TRIPLET         0
 REAC H2COH               0
 REAC oh                  0
 REAC c2h_2sig+           0
 REAC ch2co_ketene        0
 REAC CO                  0
 HP
 TEMP 300
 TEST 2000
 PRES 1
 END

  Constant pressure and enthalpy problem.

         WORKING SPACE REQUIREMENTS
             PROVIDED        REQUIRED
 INTEGER           13850          13850
 REAL              68855          68855
 CHAR                 64             64

  MIXTURE:         INITIAL STATE:      EQUILIBRIUM STATE:

 P (atm)               1.0000E+00          1.0000E+00
 T (K)                 3.0000E+02          3.1924E+03
 V (cm3/gm)            9.2268E+02          1.2133E+04
 H (erg/gm)           -9.3181E+09         -9.3181E+09
 U (erg/gm)           -1.0253E+10         -2.1612E+10
 S (erg/gm-K)          7.6365E+07          1.3428E+08
 W (gm/mol)            2.6680E+01          2.1589E+01
 Mol Fractions
 CH4                   3.3333E-01          3.6795E-14   CH4
 CO2                   0.0000E+00          8.7571E-02   CO2
 CH2_3B1               0.0000E+00          4.5668E-12   CH2 3B1
 h_2s                  0.0000E+00          6.5016E-02   H 2s
 C_3P                  0.0000E+00          2.2548E-11   C 3P
 O_3P                  0.0000E+00          2.6065E-02   O 3P
 H20                   0.0000E+00          4.3097E-01   HOH
 HOO_2A"               0.0000E+00          4.9806E-05   HOO 2A"
 H2                    0.0000E+00          4.8837E-02   H2
 CH3                   0.0000E+00          5.8434E-12   CH3
 HCO                   0.0000E+00          6.6118E-07   HCO
 O2_3SIG-              6.6667E-01          1.0512E-01   O2 3SIG-
 HOOH                  0.0000E+00          1.4603E-06   HOOH
 H2CO                  0.0000E+00          3.4228E-09   H2CO
 oh                    0.0000E+00          5.4214E-02   OH
 CO                    0.0000E+00          1.8215E-01   CO

 Total CPUtime: Less than 1 second

 --------------------------------------------------------------------------------
 Mol Fractions (by final fractional amount)
 H20                   0.0000E+00          4.3097E-01   HOH
 CO                    0.0000E+00          1.8215E-01   CO
 O2_3SIG-              6.6667E-01          1.0512E-01   O2 3SIG-
 CO2                   0.0000E+00          8.7571E-02   CO2
 h_2s                  0.0000E+00          6.5016E-02   H 2s
 oh                    0.0000E+00          5.4214E-02   OH
 H2                    0.0000E+00          4.8837E-02   H2
 O_3P                  0.0000E+00          2.6065E-02   O 3P
 HOO_2A"               0.0000E+00          4.9806E-05   HOO 2A"
 HOOH                  0.0000E+00          1.4603E-06   HOOH
 HCO                   0.0000E+00          6.6118E-07   HCO
 H2CO                  0.0000E+00          3.4228E-09   H2CO
 C_3P                  0.0000E+00          2.2548E-11   C 3P
 CH3                   0.0000E+00          5.8434E-12   CH3
 CH2_3B1               0.0000E+00          4.5668E-12   CH2 3B1
 CH4                   3.3333E-01          3.6795E-14   CH4
 --------------------------------------------------------------------------------

CHEMKIN is a registered trademark of Sandia National Laboratories and Reaction Design, Inc.