| タイトル | Strength of Chemical Bonds |
| 本文（外部サイト） | http://hdl.handle.net/2060/19980004003 |
| 著者（英） | Christian, Jerry D. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1973-03-01 |
| 言語 | eng |
| 内容記述 | Students are not generally made aware of the extraordinary magnitude of the strengths of chemical bonds in terms of the forces required to pull them apart. Molecular bonds are usually considered in terms of the energies required to break them, and we are not astonished at the values encountered. For example, the Cl2 bond energy, 57.00 kcal/mole, amounts to only 9.46 x 10(sup -20) cal/molecule, a very small amount of energy, indeed, and impossible to measure directly. However, the forces involved in realizing the energy when breaking the bond operate over a very small distance, only 2.94 A, and, thus, f(sub ave) approx. equals De/(r - r(sub e)) must be very large. The forces involved in dissociating the molecule are discussed in the following. In consideration of average forces, the molecule shall be assumed arbitrarily to be dissociated when the atoms are far enough separated so that the potential, relative to that of the infinitely separated atoms, is reduced by 99.5% from the potential of the molecule at the equilibrium bond length (r(sub e)) for Cl2 of 1.988 A this occurs at 4.928 A. |
| NASA分類 | Chemistry and Materials (General) |
| レポートNO | NASA-TM-112790
NAS 1.15:112790 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/100210 |
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