Accession Number : AD0289834

Title :   THE LOGARITHMIC TEMPERATURE DEPENDENCE OF THE PARTITION ENTROPY

Corporate Author : BUREAU OF NAVAL WEAPONS WASHINGTON D C

Personal Author(s) : VILLARS,D.S.

Report Date : SEP 1962

Pagination or Media Count : 1

Abstract : The partition part of the entropy (i.e., R ln Q) has a much simpler theoretical temperature behavior than entropy itself or enthalpy, yet completely defines the effect of temperature on the free energy. A study has been made of the dependence on logarithm of temperature, which in simplest cases reproduces the whole temperature effect, of the theoretical function for perfect gases. Quite good values are extrapolatable for atoms and diatomic molecules. Discrepancies become greater as one proceeds to molecules having low-frequency vibrations. As would be anticipated extrapolations in which two data points give an empirical number of effective virtual degrees of freedom are better than those obtainable by extrapolations from only one datum point. (Author)

Descriptors :   *ENTROPY, *GASES, *QUANTUM STATISTICS, *THERMODYNAMICS, ATOMS, CHEMICAL REACTIONS, ENERGY, PROBABILITY, VIBRATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE