Page 407 - Handbook of Thermodynamic Diagrams 3 : Organic Compounds C8 to C28

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: 841 C8H18 n-OCTANE

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 0.00 0.266 0.023 -188.42 -0.292
500.0 100.00 0.228 0.024 -139.01 -0.195
500.0 200.00 0.204 0.025 -83.69 -0.104
500.0 300.00 0.192 0.027 -22.19 -0.018
500.0 400.00 0.190 0.031 46.12 0.067
500.0 500.00 0.206 0.037 123.11 0.151
500.0 1000.00 0.892 0.245 566.92 0.527
3000.0 0.00 1.573 0.023 -179.50 -0.296
3000.0 100.00 1.336 0.023 -130.64 -0.200
3000.0 200.00 1.181 0.024 -76.27 -0.111
3000.0 300.00 1.077 0.026 -16.44 -0.026
3000.0 400.00 1.011 0.027 48.72 0.054
3000.0 500.00 0.974 0.029 118.99 0.131
3000.0 1000.00 1.051 0.048 530.51 0.474
10000.0 0.00 5.132 0.022 -153.76 -0.303
10000.0 100.00 4.306 0.023 -105.62 -0.208
10000.0 200.00 3.741 0.023 -52.27 -0.121
10000.0 300.00 3.336 0.024 6.18 -0.038
10000.0 400.00 3.034 0.025 69.52 0.040
10000.0 500.00 2.804 0.025 137.49 0.115

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