Chemistry 208 Lab Report 8 - Thermodynamics of...

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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 plotting the graph, the equation of the best fit line would indicate the values of enthalpy and entropy, where the enthalpy value is the slope of the graph, and entropy is the y–
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This lab report was uploaded on 04/01/2008 for the course CHEM 2080 taught by Professor Davis,f during the Spring '07 term at Cornell University (Engineering School).

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Chemistry 208 Lab Report 8 - Thermodynamics of...

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