Electrochemistry Day 19.pptx - Electrochemistry CHM 125 Day...

This preview shows page 1 - 3 out of 10 pages.

Electrochemistry CHM 125 Day 19
Image of page 1

Subscribe to view the full document.

Definitions Voltaic Cell Uses a spontaneous reaction to generate electrical energy. In the cell reaction, the difference in free energy between higher energy reactants and lower energy products is converted into electrical energy which operates the load. (DVD player, Flashlight, ….) Thus, the system does work on the surroundings Electrolytic Cell Uses electrical energy to drive a nonspontaneous reaction. In the cell reaction, an external source supplies free energy to convert lower energy reactants into higher energy products. Thus, the surroundings do work on the system. Electrodes The part of the electrochemical cell that conducts electricity between the cell and the surroundings. Cathode The electrode at which reduction occurs in an electrochemical cell. Electrons enter the cell and are acquired by the oxidizing agent at the cathode. Anode The electrode at which oxidation occurs in an electrochemical cell. Electrons are given up by the reducing agent and leave the cell at the anode.
Image of page 2
Construction of a Voltaic Cell
Image of page 3
You've reached the end of this preview.

{[ 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