J.7 Nitrogen oxide, N2O4(g)
\[\mathrm{N_2}(g) + \mathrm{2O_2}(g) \longrightarrow \mathrm{N_2O_4}(g)\]
Data
Enthalpy reference temperature (Tr = 298.15 K); Standard state pressure = p° = 0.1 MPa
- C°p, S°, and -[G°-H°(Tr)]/T in J mol–1 K–1
- ΔH°f and ΔG°f in kJ mol–1
| T (K) | C°p | S° | –[G°-H°(Tr)]/T | H° -H°(Tr) | ΔH°f | ΔG°f | log Kf |
|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | INFINITE | -16.398 | 18.718 | 18.718 | INFINITE |
| 100 | 46.262 | 239.166 | 363.098 | -12.393 | 14.011 | 40.737 | -21.279 |
| 200 | 63.206 | 276.398 | 311.015 | -6.923 | 10.749 | 68.86 | -17.984 |
| 250 | 70.825 | 291.339 | 305.613 | -3.568 | 9.732 | 83.513 | -17.449 |
| 298.15 | 77.256 | 304.376 | 304.376 | 0 | 9.079 | 97.787 | -17.132 |
| 300 | 77.487 | 304.854 | 304.377 | 0.143 | 9.06 | 98.338 | -17.122 |
| 350 | 83.34 | 317.248 | 305.343 | 4.167 | 8.673 | 113.251 | -16.902 |
| 400 | 88.521 | 328.722 | 307.557 | 8.466 | 8.523 | 128.204 | -16.742 |
| 450 | 93.121 | 339.419 | 310.509 | 13.009 | 8.567 | 143.163 | -16.618 |
| 500 | 97.204 | 349.446 | 313.907 | 17.769 | 8.769 | 158.109 | -16.518 |
| 600 | 104.012 | 367.795 | 321.388 | 27.844 | 9.542 | 187.911 | -16.359 |
| 700 | 109.314 | 384.244 | 329.213 | 38.522 | 10.667 | 217.555 | -16.234 |
| 800 | 113.439 | 399.122 | 337.037 | 49.668 | 12.03 | 247.019 | -16.129 |
| 900 | 116.665 | 412.677 | 344.7 | 61.18 | 13.554 | 276.303 | -16.036 |
| 1000 | 119.208 | 425.106 | 352.127 | 72.978 | 15.189 | 305.41 | -15.953 |
| 1100 | 121.235 | 436.566 | 359.29 | 85.004 | 16.899 | 334.35 | -15.877 |
| 1200 | 122.867 | 447.187 | 366.177 | 97.212 | 18.661 | 363.132 | -15.807 |
| 1300 | 124.196 | 457.076 | 372.794 | 109.567 | 20.456 | 391.765 | -15.741 |
| 1400 | 125.29 | 466.321 | 379.148 | 122.044 | 22.272 | 420.259 | -15.68 |
| 1500 | 126.198 | 474.997 | 385.251 | 134.619 | 24.097 | 448.623 | -15.622 |
| 1600 | 126.959 | 483.167 | 391.118 | 147.278 | 25.922 | 476.865 | -15.568 |
| 1700 | 127.603 | 490.884 | 396.762 | 160.007 | 27.742 | 504.994 | -15.517 |
| 1800 | 128.152 | 498.193 | 402.196 | 172.796 | 29.55 | 533.014 | -15.468 |
| 1900 | 128.623 | 505.135 | 407.432 | 185.635 | 31.34 | 560.936 | -15.421 |
| 2000 | 129.03 | 511.743 | 412.484 | 198.518 | 33.11 | 588.764 | -15.377 |
| 2100 | 129.385 | 518.047 | 417.362 | 211.439 | 34.855 | 616.503 | -15.335 |
| 2200 | 129.694 | 524.074 | 422.077 | 224.394 | 36.573 | 644.162 | -15.294 |
| 2300 | 129.967 | 529.845 | 426.638 | 237.377 | 38.262 | 671.741 | -15.256 |
| 2400 | 130.208 | 535.381 | 431.054 | 250.386 | 39.92 | 699.247 | -15.219 |
| 2500 | 130.421 | 540.701 | 435.334 | 263.418 | 41.545 | 726.685 | -15.183 |
| 2600 | 130.612 | 545.82 | 439.486 | 276.469 | 43.138 | 754.059 | -15.149 |
| 2700 | 130.783 | 550.753 | 443.516 | 289.539 | 44.698 | 781.373 | -15.117 |
| 2800 | 130.936 | 555.512 | 447.431 | 302.625 | 46.224 | 808.63 | -15.085 |
| 2900 | 131.074 | 560.109 | 451.238 | 315.726 | 47.718 | 835.831 | -15.055 |
| 3000 | 131.2 | 564.555 | 454.942 | 328.84 | 49.178 | 862.983 | -15.026 |
| 3100 | 131.313 | 568.859 | 458.547 | 341.966 | 50.606 | 890.087 | -14.998 |
| 3200 | 131.417 | 573.029 | 462.06 | 355.102 | 52.002 | 917.144 | -14.971 |
| 3300 | 131.511 | 577.075 | 465.484 | 368.249 | 53.368 | 944.157 | -14.945 |
| 3400 | 131.597 | 581.002 | 468.824 | 381.404 | 54.703 | 971.132 | -14.92 |
| 3500 | 131.677 | 584.818 | 472.084 | 394.568 | 56.01 | 998.066 | -14.895 |
| 3600 | 131.75 | 588.528 | 475.268 | 407.739 | 57.288 | 1024.964 | -14.872 |
| 3700 | 131.817 | 592.139 | 478.378 | 420.918 | 58.538 | 1051.826 | -14.849 |
| 3800 | 131.879 | 595.655 | 481.418 | 434.102 | 59.762 | 1078.657 | -14.827 |
| 3900 | 131.936 | 599.082 | 484.391 | 447.293 | 60.96 | 1105.455 | -14.806 |
| 4000 | 131.99 | 602.423 | 487.3 | 460.49 | 62.132 | 1132.22 | -14.785 |
| 4100 | 132.039 | 605.683 | 490.148 | 473.691 | 63.279 | 1158.958 | -14.765 |
| 4200 | 132.085 | 608.865 | 492.937 | 486.897 | 64.402 | 1185.669 | -14.746 |
| 4300 | 132.128 | 611.973 | 495.669 | 500.108 | 65.501 | 1212.353 | -14.727 |
| 4400 | 132.168 | 615.011 | 498.347 | 513.323 | 66.575 | 1239.011 | -14.709 |
| 4500 | 132.206 | 617.982 | 500.973 | 526.542 | 67.626 | 1265.644 | -14.691 |
| 4600 | 132.241 | 620.888 | 503.548 | 539.764 | 68.653 | 1292.255 | -14.674 |
| 4700 | 132.274 | 623.733 | 506.075 | 552.99 | 69.654 | 1318.845 | -14.657 |
| 4800 | 132.305 | 626.518 | 508.555 | 566.219 | 70.63 | 1345.413 | -14.641 |
| 4900 | 132.334 | 629.246 | 510.991 | 579.451 | 71.581 | 1371.962 | -14.625 |
| 5000 | 132.361 | 631.92 | 513.383 | 592.685 | 72.504 | 1398.491 | -14.61 |
| 5100 | 132.387 | 634.541 | 515.733 | 605.923 | 73.4 | 1425.003 | -14.595 |
| 5200 | 132.411 | 637.112 | 518.042 | 619.163 | 74.267 | 1451.494 | -14.58 |
| 5300 | 132.434 | 639.635 | 520.313 | 632.405 | 75.104 | 1477.973 | -14.566 |
| 5400 | 132.456 | 642.11 | 522.545 | 645.649 | 75.908 | 1504.434 | -14.553 |
| 5500 | 132.476 | 644.541 | 524.742 | 658.896 | 76.68 | 1530.88 | -14.539 |
| 5600 | 132.496 | 646.928 | 526.902 | 672.145 | 77.417 | 1557.315 | -14.526 |
| 5700 | 132.514 | 649.273 | 529.029 | 685.395 | 78.116 | 1583.734 | -14.513 |
| 5800 | 132.532 | 651.578 | 531.122 | 698.648 | 78.776 | 1610.145 | -14.501 |
| 5900 | 132.549 | 653.844 | 533.183 | 711.902 | 79.394 | 1636.539 | -14.489 |
| 6000 | 132.564 | 656.072 | 535.212 | 725.157 | 79.968 | 1662.928 | -14.477 |