Thermodynamics of Electrochemical Cells
YtJ
Mike Zettel
May 3, 2005
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Abstract:
This experiment examined the standard cell potential as a function of temperature for a
galvanic cell.
By comparing the standard cell potentials, it was determined that
increasing the temperature lowered the standard cell potential.
Introduction:
This experiment sought to measure standard cell potentials at different temperatures.
Also, this experiment could also be used to find thermodynamic values.
Since
ln
cell
RT
E
K
nF
o
, the equilibrium constant could be found through simple mathematic
calculations.
Moreover, since
cell
G
nFE
o
& ΔG = RTlnK, other thermodynamic
values could be found since ΔG = ΔH – TΔS.
Relating these equations, it was found that:
ln
H
S
K
RT
R
.
So, performing this experiment could lead to finding values for
enthalpy and entropy by plotting the graph of lnK versus the inverse temperature.
After
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 Spring '07
 DAVIS,F
 Chemistry, Thermodynamics, Salt bridge, Standard Cell Potentials

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