18 resultados para Electrostatic factors contributing to the high oxidation potential of P680


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Province of Upper Canada Grant to the Honorable Peter Russell of the Township of Newark. He is granted 150 acres in the Town of Newark in the County of Lincoln. This is registered in Liber B, folio 133. This was entered in the auditor’s office July 26, 1796. This document is held together with tape. The text is not affected, July 2, 1796.

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Province of Upper Canada Grant (paper mounted on canvas) to the Honorable Peter Russell of the Township of Newark. He is granted 10 acres in the Township of Newark in the County of Lincoln. This document is mounted on canvas. This was entered in the auditor’s office Sept.29, 1797. Part of the paper document is missing but this does not affect the text, Sept. 1, 1797.

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We have calculated the thermodynamic properties of monatomic fcc crystals from the high temperature limit of the Helmholtz free energy. This equation of state included the static and vibrational energy components. The latter contribution was calculated to order A4 of perturbation theory, for a range of crystal volumes, in which a nearest neighbour central force model was used. We have calculated the lattice constant, the coefficient of volume expansion, the specific heat at constant volume and at constant pressure, the adiabatic and the isothermal bulk modulus, and the Gruneisen parameter, for two of the rare gas solids, Xe and Kr, and for the fcc metals Cu, Ag, Au, Al, and Pb. The LennardJones and the Morse potential were each used to represent the atomic interactions for the rare gas solids, and only the Morse potential was used for the fcc metals. The thermodynamic properties obtained from the A4 equation of state with the Lennard-Jones potential, seem to be in reasonable agreement with experiment for temperatures up to about threequarters of the melting temperature. However, for the higher temperatures, the results are less than satisfactory. For Xe and Kr, the thermodynamic properties calculated from the A2 equation of state with the Morse potential, are qualitatively similar to the A 2 results obtained with the Lennard-Jones potential, however, the properties obtained from the A4 equation of state are in good agreement with experiment, since the contribution from the A4 terms seem to be small. The lattice contribution to the thermal properties of the fcc metals was calculated from the A4 equation of state, and these results produced a slight improvement over the properties calculated from the A2 equation of state. In order to compare the calculated specific heats and bulk moduli results with experiment~ the electronic contribution to thermal properties was taken into account~ by using the free electron model. We found that the results varied significantly with the value chosen for the number of free electrons per atom.