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Unformatted text preview: Discussion The purpose of this experiment was to study the effects of temperature and concentration on cell potentials. From the temperature dependence of cell potentials a change in Gibbs free energy, enthalpy, and entropy can be calculated. In the first part of the experiment, the effect of concentration on the cell potential was tested. This was carried out by creating a galvanic cell; the solid zinc electrode was placed in a Zn(NO3)2 aqueous solution while the solid copper electrode was placed in a Cu(NO3)2 aqueous solution (the molarity of the aqueous solutions was the independent variable in this part of the experiment.) The two systems were connected by a 1M KNO3 salt bride. After the galvanic cell was created, the voltage of the cell was tested using a voltmeter. The voltmeter measured the voltage of the cell potential, while the calculated cell potential was found using the...
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- Spring '08
- Enthalpy, Gibbs, 1m, experimental values, Cell Potentials, calculated values