Accession Number : AD0646246

Title :   THE ATOMIZATION ENERGIES OF THE POLYMERS OF GERMANIUM, GE2 TO GE7.

Descriptive Note : Technical rept.,

Corporate Author : ARMY MATERIALS RESEARCH AGENCY WATERTOWN MASS

Personal Author(s) : Kant,Arthur ; Strauss,Bernard H.

Report Date : SEP 1966

Pagination or Media Count : 19

Abstract : Using information derived from a combination of effusion and mass spectrometric techniques at high temperature, the atomization energies and free energies for the reactions Ge sub n (gas) = n(Ge gas) (n = 2,3,4,5,6,7) have been determined. The values of the energy obtained from the variation of the free energy of atomization with temperature (second law of thermodynamics method) are 65, 149, 238, 321, 407, and 481 kcal/mol for n of 2, 3, 4, 5, 6, and 7, respectively. A comparison of these values with the atomization energies calculated from the third law of thermodynamics (absolute entropy method), assuming that the configuration of the molecules (n > 2) is either a linear chain or a cyclic structure, indicates that the former structure is to be preferred. The bond energies (process Ge sub n = Ge sub n-1 + Ge) obtained from the second law are 75, 86, 83, 89, 84, and 65 kcal/mol for n of 7, 6, 5, 4, 3, and 2, respectively. (Author)

Descriptors :   (*GERMANIUM, *HEAT OF REACTION), POLYMERS, ENTHALPY, PHYSICAL CHEMISTRY, HIGH TEMPERATURE, CHEMICAL BONDS, DISSOCIATION, THERMOCHEMISTRY, CHEMICAL EQUILIBRIUM

Subject Categories : Physical Chemistry
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE