ISSN:
1572-8927
Schlagwort(e):
Electrolytes
;
anions
;
cations
;
heats
;
enthalpies
;
entropies
;
solution
;
transfer
;
1,1-dichloroethane
;
1,2-dichloroethane
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract Heats of solution of nine electrolytes in 1,2-dichloroethane and of three electrolytes in 1,1-dichloroethane have been determined calorimetrically at various electrolyte concentrations and extrapolated to zero concentration to yield ΔH s o values for these electrolytes. It is shown that values of ΔH t o for transfer from water to the dichloroethanes of 1∶1 electrolytes are often negative, so that these electrolytes can be more stable enthalpically in the less polar solvents. Combinations of the ΔH t o values with previously determined ΔG t o values yield values of ΔS t o for transfer of 1∶1 electrolytes from water to the dichloroethanes. These ΔS t o values are mostly very negative; they can be correlated very well by the method of Abraham, and in this way ΔS t o values for transfer of numerous other anions and cations have been predicted. The Ph4As+/Ph4B− convention yields single-ion entropies of transfer from water to the dichloroethanes in reasonable agreement with values calculated by the correspondence-plot method.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00647376
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