ISSN:
1572-8927
Schlagwort(e):
Volumes
;
apparent molal
;
heat capacities
;
apparent molal
;
ultrasonic vibration potential
;
acetonitrile
;
electrolytes
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract The ultrasonic vibration potentials and apparent molal volumes for many inorganic and organic electrolytes were measured in acetonitrile at 25°C and combined to obtain ionic contributions to the standard partial molal volumes V°(ion). Monatomic cations and anions of the same size essentially have the same V°(ion). Their size dependence can be interpreted through Hepler's equation. The apparent molal heat capacities were also measured in acetonitrile and used to derive standard values. Various methods of estimating C p 0 (ion) were investigated and an ionic scale is proposed. It is concluded that C p 0 (ion) of large organic ions are very close to the intrinsic heat capacities of the ions, and the solvation contribution to monatomic ions is positive for both cations and anions.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00648778
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