Galvanic Cells

Moderators: Chem_Mod, Chem_Admin

Hector Acosta Discussion 1H
Posts: 51
Joined: Fri Sep 29, 2017 7:04 am

Galvanic Cells

Postby Hector Acosta Discussion 1H » Fri Feb 23, 2018 3:30 pm

Will galvanic cells always have a positive E nought value?

Rachel Lu_dis1H
Posts: 66
Joined: Fri Sep 29, 2017 7:06 am
Been upvoted: 1 time

Re: Galvanic Cells

Postby Rachel Lu_dis1H » Fri Feb 23, 2018 3:50 pm

yes, because they're spontaneous

Angel Gomez 1K
Posts: 36
Joined: Fri Sep 29, 2017 7:04 am

Re: Galvanic Cells

Postby Angel Gomez 1K » Fri Feb 23, 2018 5:40 pm

If we calculate a standard potential and the value comes out to be negative, does that mean that it's not a galvanic cell? If not, then what type of cell is it?

Posts: 63
Joined: Thu Jul 13, 2017 3:00 am
Been upvoted: 2 times

Re: Galvanic Cells

Postby kaushalrao2H » Fri Feb 23, 2018 6:44 pm

if we calculate a cell potential and it comes out negative, then we know that the forward process is nonspontaneous while the reverse process IS spontaneous. therefore, the cell can be a galvanic cell going in the reverse (spontaneous) direction. a cell can be considered galvanic if there is some spontaneous process occurring that leads to the generation of an electrical current that can be used to do nonexpansion work.

Christine Wastila 1H
Posts: 61
Joined: Fri Sep 29, 2017 7:04 am

Re: Galvanic Cells

Postby Christine Wastila 1H » Sat Feb 24, 2018 8:11 pm

If E is negative, then the process is called electrolysis, which is where an electric current is used to drive a non-spontaneous reaction. In a Galvanic cell, chemical energy is converted to electrical energy. The opposite is true of electrolysis.

Cassandra Mullen 1E
Posts: 54
Joined: Fri Sep 29, 2017 7:07 am
Been upvoted: 2 times

Re: Galvanic Cells

Postby Cassandra Mullen 1E » Sat Feb 24, 2018 10:06 pm

A galvanic cell occurs spontaneously due to the positive voltage. The cell potential is positive since the cathode electrode potential is greater than the anode electrode potential. The negatively charged electrons flow in the cell since they are attracted to the more positive end.

Return to “Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams”

Who is online

Users browsing this forum: No registered users and 2 guests