| タイトル | Temperature and pressure dependence of the absolute rate constant for the reactions of NH2 radicals with acetylene and ethylene |
| 著者（英） | Brobst, W. D.; Nava, D. F.; Stief, L. J.; Bosco, S. R. |
| 著者所属（英） | Johns Hopkins Univ.|Air Force Academy|Catholic Univ. of America|NASA Goddard Space Flight Center |
| 発行日 | 1984-10-15 |
| 言語 | eng |
| 内容記述 | The absolute rate constants for the reaction between the NH2 free radical and acetylene and ethylene is measured experimentally using a flash photolysis technique. The constant is considered to be a function of temperature and pressure. At each temperature level of the experiment, the observed pseudo-first-order rate constants were assumed to be independent of flash intensity. The results of the experiment indicate that the bimolecular rate constant for the NH2 + C2H2 reaction increases with pressure at 373 K and 459 K but not at lower temperatures. Results near the pressure limit conform to an Arrhenius expression of 1.11 (+ or -) 0.36 x 10 to the -13th over the temperature range from 241 to 459 K. For the reaction NH2 + C2H4, a smaller rate of increase in the bimolecular rate constant was observed over the temperature range 250-465 K. The implications of these results for current theoretical models of NH2 + C2H2 (or H4) reactions in the atmospheres of Jupiter and Saturn are discussed. |
| NASA分類 | INORGANIC AND PHYSICAL CHEMISTRY |
| レポートNO | 85A14260 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/394211 |
