Page 366 - Handbook of Thermodynamic Diagrams 1 : Organic Compounds C1 to C4

Appendix H

Computer Program for Thermodynamic Properties

A computer program for calculation of thermodynamic properties using the Peng-Robinson equation of state
is available for a nominal fee (Carl L. Yaws, Box 10053, Lamar University, Beaumont, TX 77710, phone/FAX
409-880-8787). The computer program is executable and complete with data files. The program calculates
thermodynamic properties at pressures and temperatures that are input by the user. Representative results are shown
below:

COMPOUND: 38 CH4 METHANE

reference state: datum of ideal gas @ 77 F (25 C)

p T Z V H S
psia F ft"3/lb BTU/lb BTU/lb F

500.0 -100.00 0.711 0.342 -129.42 -0.715
500.0 0.00 0.878 0.540 -63.12 -0.552
500.0 100.00 0.938 0.703 -3.09 -0.434
500.0 200.00 0.967 0.854 57.52 -0.334
500.0 300.00 0.983 1.000 120.68 -0.245
500.0 400.00 0.993 1.142 187.39 -0.163
500.0 500.00 0.998 1.282 258.21 -0.085
500.0 1000.00 1.008 1.968 680.95 0.267
3000.0 -100.00 0.588 0.047 -247.28 -1.144
3000.0 0.00 0.699 0.072 -151.24 -0.909
3000.0 100.00 0.837 0.105 -63.59 -0.736
3000.0 200.00 0.925 0.136 13.76 -0.608
3000.0 300.00 0.976 0.165 87.76 -0.504
3000.0 400.00 1.007 0.193 162.12 -0.412
3000.0 500.00 1.026 0.220 238.68 -0.328
3000.0 1000.00 1.053 0.343 677.10 0.037
10000.0 -100.00 1.537 0.037 -233.64 -1.252
10000.0 0.00 1.385 0.043 -159.84 -1.071
10000.0 100.00 1.317 0.049 -84.87 -0.924
10000.0 200.00 1.287 0.057 -9.10 -0.799
10000.0 300.00 1.272 0.065 67.70 -0.691
10000.0 400.00 1.262 0.073 146.20 -0.594
10000.0 500.00 1.254 0.081 227.12 -0.505
10000.0 1000.00 1.215 0.119 683.01 -0.125

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