lab_exp11 - 0.445-42.94-42.209-0.0179 298...

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

View Full Document Right Arrow Icon
Experiment 11: Electrochemistry Chemistry 1046L-
Background image of page 1

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

View Full DocumentRight Arrow Icon
Purpose: The purpose of this lab was to learn how to construct and operate a potential cell. This lab also taught how to calculate the Nernst equation as well as the Gibbs Free Energy, Enthalpy, and Entropy of cells. In addition, this lab reinforced basic measuring techniques. Procedure: There were no changes to the procedure. Dillon, Stephanie. “Electrochemistry.” CHM1046L Online Manual . Fall 2011. 21 September 2011. <http://www.chem.fsu.edu/chemlab/chm1046lmanual/electrochemistry/index.html > Data: Cell Cell Potential Literature Values Percent Error Mg/Cu (V) 1.371 2.89 52.5% Al/Cu (V) 0.654 1.91 65.8% Mg/Pb (V) 0.954 2.24 57.4% Mg/Fe (V) 0.924 2.33 60.0% Fe/Pb (V) 0.0089 0.094 90.5% Al/Pb (V) 0.023 1.53 98.5% Fe/Cu (V) 0.51 0.196 160% Fe/Cu Temp (K) Cell Potential (V) ΔG (kJ/mol) K ΔH (kJ/mol) ΔS (J/mol) 283
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 0.445-42.94-42.209-0.0179 298 0.542-52.30-42.209-0.0179 328 0.516-49.79-42.209-0.0179 343 0.472-45.54-42.209-0.0179 Calculations: Conclusion: The G, K, H, and S values were calculated to be -42.94 kJ/mol, , -42.2 J/mol, and -.0179 J/mol respectively. The H was found by calculating the y-intercept of the graph and the S was found by calculating the slope of the graph. The values observed were very far off from the literature values. Contamination or improper use of the voltmeter could have resulted in errors in finding the values. A watt is the SI unit of power equivalent to one joule per second. This relates to the potential of a battery because each watt corresponds to the power circuit in which the potential difference is one volt and the current one ampere....
View Full Document

This note was uploaded on 03/16/2012 for the course CHEMISTRY 1046L taught by Professor Chaolv during the Fall '11 term at FSU.

Page1 / 3

lab_exp11 - 0.445-42.94-42.209-0.0179 298...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online