Table 5.
Temperature variation of transition state Gibbs energies for dissociation of hydrogen molecules to hydrogen atoms.
| Temp K | Entropy (oS) at 1 atm J/K |
ST kJ/mole |
Entropy (S) at 1 atm J/K |
ST kJ/mole |
−TΔS | −ΔH H2=>2H = 436 kJ |
Gibbs Change ΔG |
|---|---|---|---|---|---|---|---|
| H | 2H | H2 | H2 | ||||
| 1000 | 134.088 | 268.176 | 165.562 | 165.562 | 102.614 | 440.157 | −366.543 |
| 2000 | 148.496 | 593.984 | 185.733 | 371.466 | 222.518 | 444.314 | −216.796 |
| 3000 | 156.924 | 941.544 | 197.533 | 592.599 | 348.445 | 448.471 | −99.526 |
| 4000 | 162.904 | 1303.232 | 205.904 | 823.616 | 479.616 | 481.628 | −2.012 |
| 5000 | 167.542 | 1675.420 | 212.348 | 1061.990 | 613.010 | 456.785 | +98.225 |
| 6000 | 171.332 | 2055.984 | 217.703 | 1306.221 | 749.763 | 460.942 | +230.821 |
| 7000 | 174.536 | 2443.504 | 222.189 | 1555.323 | 888.181 | 465.099 | +365.082 |
| 8000 | 177.312 | 2836.992 | 226.075 | 1808.600 | 1028.342 | 469.256 | +501.086 |
| 9000 | 179.760 | 3235.680 | 229.503 | 2065.520 | 1170.160 | 473.413 | +648.747 |