Original scientific paper

Thermodynamics of Hydrobromic Acid in 10 wt. Per Cent 2-Propanol Water Mixture from Electromotive Force Measurements

I. Mekjavić ; Department of Physical Chemistry, Faculty of Chemical Technology, University of · Split, 58000 Split, Croatia, Yugoslavia
I. Tominić ; Department of Physical Chemistry, Faculty of Chemical Technology, University of · Split, 58000 Split, Croatia, Yugoslavia

Abstract

The e.m. f.' ff of the cell : k't, H2(g) I Fi:Br(m), 10 wt-0/v 2-propanol,
90 wt--O/o water I AgBr, Ag at temperatures 15, 25 and 35 °c.
· tor hydrobromic acid solutions ih the range from 0.003 to ·0.1 mol
kg-1 have been measured. The d,ata have been used to derive a) the
e,quation of .standard potential of Ag/A.gBr electrode as a function
of temperatu~e , b) the standard thermodynamic quantities fo.r ' the.
cell reaction and the reaction of HBr formation, c) the mean activity
coefficients of HBr, d) the primary medium effect, and e) the
standard 'quantities for transfer of HBr from water to the mixed
solvent · of the 10 vit-0/o 2-propanol. According to values for e), it
· can ·be stated that the 'transfer process of HBr is not spontaneous,
. arrd that the mixed solvent is a stronger base than wate•r and has
a more developed structure than water.

Keywords

Hrčak ID:

196690

URI

https://hrcak.srce.hr/196690

Publication date:

28.5.1975.

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