Homework Help: science

Posted by helpmeplease on Monday, December 10, 2007 at 10:30pm.

What energy changes occur in an electrochemical cell when electric current flows from it?

This is what I put down but I am not sure if it is right...

In a primary cell, chemical reactions use up some of the materials in the cell as electrons flow from it. This causes an energy change, because when these materials have been used up, the cell is said to be discharged and cannot be recharged.

science - DrBob222, Monday, December 10, 2007 at 10:34pm
I think most of what you have said is correct although some cells can be recharged. You might want to add that electrons move from the negative electrode to the positive electrode outside the cell when the cell is hooked up to use the current produced in the chemical reactions.

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