Heat Capacity Constants (Cp = A + BT + CT² + DT³)
| Component | A | B×10³ | C×10⁶ | D×10⁹ |
|---|
| Methane | 8.552 | 1.110 | -0.223 | 0.0133 |
| Ethane | 9.469 | 3.636 | -1.171 | 0.1434 |
| Propane | 9.011 | 6.033 | -2.139 | 0.2901 |
| n-Butane | 11.928 | 7.559 | -2.648 | 0.3565 |
| n-Pentane | 14.731 | 9.170 | -3.187 | 0.4286 |
| CO₂ | 10.570 | 0.847 | -0.378 | 0.0618 |
| H₂S | 7.817 | 1.231 | -0.409 | 0.0532 |
| N₂ | 6.903 | 0.275 | -0.060 | 0.0031 |
Latent Heat of Vaporization
| Component | At NBP (Btu/lb) | At 60°F (Btu/lb) | At 100°F (Btu/lb) |
|---|
| Methane | 219.2 | - | - |
| Ethane | 210.5 | 168.8 | 141.0 |
| Propane | 183.1 | 156.8 | 134.5 |
| i-Butane | 166.8 | 147.4 | 129.8 |
| n-Butane | 165.7 | 147.3 | 130.4 |
| i-Pentane | 153.7 | 140.3 | 125.9 |
| n-Pentane | 153.0 | 140.6 | 126.9 |
| Water | 970.3 | 1054.3 | 1037.2 |
Joule-Thomson Coefficients
| Component | μJT @ 60°F, 500 psia | μJT @ 100°F, 1000 psia | Units |
|---|
| Methane | 3.5 | 2.8 | °F/100 psi |
| Ethane | 6.2 | 5.1 | °F/100 psi |
| Propane | 7.8 | 6.5 | °F/100 psi |
| Natural Gas (0.6 SG) | 4.5 | 3.8 | °F/100 psi |
| Natural Gas (0.7 SG) | 5.2 | 4.4 | °F/100 psi |
| Natural Gas (0.8 SG) | 5.8 | 4.9 | °F/100 psi |