Accession Number : AD0023060


Title :   THE INTERMOLECULAR POTENTIALS FOR SOME SIMPLE NON-POLAR MOLECULES


Corporate Author : WISCONSIN UNIV-MADISON THEORETICAL CHEMISTRY INST


Personal Author(s) : Mason, Edward A ; Rice, William E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/023060.pdf


Report Date : 06 Nov 1953


Pagination or Media Count : 34


Abstract : Experimental data on the crystal properties, second virial coefficients, and viscosity coefficients of Ne, A, Kr, Xe, CH4, N2, CO, CO2, and O2 were analyzed to provide parameter values for the exp-6 to intermolecular potential, phi(r) = EPSILON/(1-6/ALPHA) 6/ALPHA)E TO THE ALPHA(1-R/RSUB M) - (R SUB M/R TO THE 6TH, where epsilon is the depth of the potential energy minimum, r sub m is the position of the minimum, and alpha is a measure of the repulsion- energy steepnes. For spherical gas molecules, the crystal, second virial, and viscosity data, as well as other transport-property data were reproduced with fair accuracy from a single set of potential parameters. However, at least 2 different sets of potential parameters were required for gases whose molecules deviate appreciable from spherical symmetry. This result was believed to indicate the inadequacy af the assumptions of central intermolecular forces and elastic intermolecular collisions.


Descriptors :   *POLARIZATION , *VAN DER WAALS FORCES , *MOLECULE MOLECULE INTERACTIONS , COEFFICIENTS , POTENTIAL ENERGY , VISCOSITY , ELASTIC PROPERTIES , PARAMETERS , EXPERIMENTAL DATA , GASES


Subject Categories : Physical Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE