Application of Pitzer formalism for thermodynamics of HBr + NdBr3 + H2O system from 5 to 55°C

CHED 1367

Lakshmi N. Roy, lroy@drury.edu, Rabindra N. Roy, rroy@drury.edu, Shahaf Ashkenazi, sashkenasi@drury.edu, and Jesse A. Larbey, jlarbey@drury.edu. Walter H. Hoffman Department of Chemistry, Drury University, 900 N. Benton Ave., Springfield, MO 65802
The thermodynamic investigation for the system HBr + NdBr3 + H2O involves fundamental applications in geochemistry. The activity coefficient of HBr as a function of temperature from 5 to 55°C and at different ionic strengths ranging from I=0.01 to 1.5 mol•kg-1 were calculated based on the emf data using a cell of the type: Pt; H2 (g, 1 atm)│HBr (mA), NdBr3 (mB)│Ag-AgBr. The silver-silver bromide and hydrogen electrodes were used in the study. Experimental data have been treated by the Pitzer equations. The applications of these data will be described in the fields of (a) industrial chemistry, (b) geological systems, and (c) modeling of natural waters.
 

Undergraduate Research Poster Session: Physical Chemistry
2:00 PM-4:00 PM, Monday, March 26, 2007 Hyatt Regency Chicago -- Riverside Center, Poster

Division of Chemical Education

The 233rd ACS National Meeting, Chicago, IL, March 25-29, 2007