chem 208 lab 8 - Exp 8 Thermodynamics of Electrochemical...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Exp. 8: Thermodynamics of Electrochemical Cells Caitlin Burrows TA: Lijun Fan Due: May 4, 2005
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Abstract : The purpose of this experiment was to measure the standard cell potential as a function of temperature for a galvanic cell. By measuring voltmeter readings at various temperatures we were able to find a relationship between the ln(K) and 1/T when the temperature was measured in Kelvin. This relationship (with y being ln(K) and x being 1/T) was y = 15639x - 20.575. Then, by knowing the slope and y-intercept of this line we were able to calculate the standard enthalpy to be -130 kJ/mol and the standard entropy to be -0.171 kJ/mol*K. Our percent error of the standard enthalpy was 11.4 %, while our percent error for the standard entropy was 12.0%. Introduction: A galvanic cell is one that relies upon a spontaneous chemical reaction to generate an electrical current; by completing this experiment we hoped to be able to find a standard cell’s potential as a function of temperature for this type of cell. By setting up an apparatus that allowed an oxidation-reduction reaction to take place, some of the chemical energy released by the reaction was able to be extracted and converted to electrical energy.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern