MOLECULAR FLOW AND THE EFFUSION PROCESS IN THE MEASUREMENT OF VAPOR PRESSURES.
Abstract
Progress on several approaches designed to clarify the understanding of the effusion under nonideal conditions is reported. Transmission probabilities, angular distribution functions, and recoil force corrections have been computed for cylindrical and conical orifices. The design and construction of an apparatus for the experimental study of angular distribution of molecules which effuse from non-ideal orifices is described. Preliminary results are presented for the multicell technique for experimental evaluation of transmission probabilities. The Electrodynamometer Momentum Detector has been tested; with it torques in the range 0.05 to 0.5 dyne-cm can be measured. A new technique, the MicrobalanceInverted Knudsen Effusion-Recoil (MIKER) Technique, for the measurement of vapor pressure and of molecular weights of vapors is discussed and the apparatus, especially the microbalance, which has been designed and constructed for its realization is described. Preliminary results for calcium fluoride are presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1963
- Accession Number
- AD0424180
Entities
People
- Robert D. Freeman
Organizations
- Oklahoma State University–Stillwater