Chemical binding energies

In fact, the measured dissociation energies of appropriate examples of homo-nuclear diatomic molecules and molecular ions are H, 2.648 e.v. H2, 4.476 e.v. He, 3.1 e.v. He2, only slight attraction in the ground electronic state (binding of van der Waals type, at internuclear separations large compared with typical chemical binding energies.)... 

Superposition of more than two thermal vibrations causing molecular dislocations removes the disproportions between the chemical binding energy f/Chem and the physical activation energy. The Arrhenius formula describes only the process of two thermal vibrations8. ... 

Finally we must consider the case that n thermal vibrations are participating only with the share rate U/n. This is quite the same as if the chemical binding energy MJ were much greater, in our case n times greater. 

If the adsorption energy is of the order of chemical binding energies we talk about chemisorption. Characteristic properties are ... 

The number of interactions between secondary structures is set at D = 6. Here the unit-normal weight, and the interacting amino acids, Ol., Jk], are selected at random for each interaction (i, a, y). The chemical binding energy of each amino acid is given by... 

The third of these possibilities is eliminated by the high chemical binding energy and the fourth has been shown to be minute because of the large mass... 

This value is large in comparison with chemical binding energies (< 5 eV). Atom jg therefore called a hot atom. Its temperature corresponds to 2 x 10 K. The thermal energy of atoms at 295.2 K, E = kT, equals 0.0382eV only. The hot atom breaks all chemical bonds by which it is bound to other atoms. 

IN THE APPLICATION of molecular orbital theory to calculations of chemical binding energies, we shall use several basic principles, some of which were mentioned in Chapter 1 and are given here by way of review ... 

Low-energy (LE) surfaces, for which the chemical binding energy is of the order of kT, which are generally hardly wettable. They include molecular crystals and plastics. In this case, we have... 

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