Gibbs--Helmholtz equation and the EMF of galvanic cells. I. Inapplicability to liquid--liquid junction potentials

Journal Article · Mon Dec 01 00:00:00 EST 1975 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2134077· OSTI ID:7188598

Brenner, A

Measurements were made of the temperature coefficient of the emf of a type of concentration cell in which the emf was generated solely by liquid--liquid junctions. The data fit the Henderson equation very well but not the Gibbs--Helmholtz equation. The discrepancy between the values of ..delta..H, computed from the Gibbs--Helmholtz equation, and the values measured calorimetrically is shown to be calculable from ionic mobilities. In addition, data are presented showing that the sum of the thermoelectric powers of the three junctions (including a liquid--liquid junction) is equal to the isothermal temperature coefficient of the emf of the cell. 4 figures, 4 tables.

• Research Organization: N-Q Electrochemical Research Corp., Reston, VA
• OSTI ID: 7188598
• Journal Information: J. Electrochem. Soc.; (United States), Vol. 122:12
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
ELECTROCHEMICAL CELLS
ELECTRIC POTENTIAL
ELECTROMOTIVE FORCE
ENTHALPY
FREE ENERGY
INTERFACES
LIQUIDS
TEMPERATURE DEPENDENCE
ENERGY
FLUIDS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
250902* - Energy Storage- Batteries- Performance & Testing