Accession Number : ADA141184

Title :   The Vapor Pressure of Salt-HCl-Water Solutions Below OC.

Descriptive Note : Annual rept. 1 Dec 82-30 Nov 83,

Corporate Author : MACKAY SCHOOL OF MINES RENO NV DEPT OF CHEMICAL AND METALLURGICAL ENGINEERING

Personal Author(s) : Miller,E

PDF Url : ADA141184

Report Date : Jan 1984

Pagination or Media Count : 11

Abstract : Vapor-liquid equilibria data are presented for hydrochloric acid solutions ranging in nominal HCl mol fraction from 0.110 to 0.225, saturated with CaClz, at nominal solution temperatures between 0 and -40C. Total pressures were measured by capacitance gauges, vapor compositions by direct vapor-phase sampling into a quadrupole mass filter and liquid compositions by electric conductivity. The addition of CaClz to hydrochloric acid breaks the azeotrope and generally increases the vapor pressures of HCl and water. Solubility and solution densities have also been measured. Solution compositions have not been completed to date limiting the interpretation of the results to some extent. These are presently being done. It is probable that the effect of CaClz on the formation of secondary smoke in a reduced smoke rocket plume has less an effect than NaCl.

Descriptors :   *Vapor pressure, *Thermochemistry, *Hydrochloric acid, *Chemical equilibrium, *Solutions(Mixtures), Saturation, Calcium compounds, Vapor phases, Liquid phases, Chlorides, Electrical conductivity, Exhaust plumes, Rocket exhaust

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE