Table 9.
Variation with temperature of Gibbs energy for Haber–Bosch reaction.
| Temp. K | NH3, S, ST | N2, S, ST | H2, S, ST | TΔS | −ΔH 93 at 0 K |
−ΔG |
|---|---|---|---|---|---|---|
| J/K, kJ/mole | J/K, kJ/mole | J/K, kJ/mole | kJ/mole | kJ/mole | kJ/mole | |
| 400 | 203.727, 81.491 | 200.189, 80.076 | 138.898, 55.559 | 83.771 | 97.924 | 14.153 |
| 500 | 212.331, 106.166 | 206.683, 103.342 | 145.391, 72.696 | 109.098 | 96.996 | −12.102 |
| 600 | 219.750, 131.850 | 211.989, 127.193 | 150.697, 90.418 | 134.747 | 95.300 | −39.447 |
| 700 | 226.328, 158.430 | 216.475, 151.533 | 155.183, 108.628 | 160.557 | 93.000 | −67.557 |
| 800 | 232.277, 185.822 | 220.361, 176.289 | 159.069, 127.255 | 186.410 | 90.094 | −93.316 |
| 900 | 237.732, 213.959 | 223.788, 201.409 | 162.496, 146.246 | 212.229 | 86.630 | −125.599 |
| 1000 | 242.789, 242.789 | 226.854, 226.854 | 165.562, 165.562 | 237.962 | 82.683 | −155.279 |