Galvanic vs Electrolytic cells

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Hannah_1G
Posts: 100
Joined: Wed Sep 18, 2019 12:22 am

Galvanic vs Electrolytic cells

Postby Hannah_1G » Thu Mar 12, 2020 11:14 pm

Can someone explain the difference between the two? I don't understand what an electrolytic cell is and how it could be different than a galvanic cell.

Kimberly Koo 2I
Posts: 99
Joined: Sat Aug 17, 2019 12:17 am

Re: Galvanic vs Electrolytic cells

Postby Kimberly Koo 2I » Fri Mar 13, 2020 8:14 am

An electrolytic cell converts electrical energy into chemical energy, while a galvanic cell converts chemical energy into electrical energy.

Ruby Tang 2J
Posts: 102
Joined: Fri Aug 30, 2019 12:15 am

Re: Galvanic vs Electrolytic cells

Postby Ruby Tang 2J » Fri Mar 13, 2020 8:16 am

A galvanic cell converts chemical energy into electrical energy, while an electrolytic cell converts electrical energy into chemical energy. In a galvanic cell, a spontaneous redox reaction (ΔG<0, energy is released) produces an electric current through an external circuit. However, in an electrolytic cell, a nonspontaneous redox reaction (ΔG>0, energy is needed) requires electrical energy to occur.

anjali41
Posts: 109
Joined: Fri Aug 09, 2019 12:15 am

Re: Galvanic vs Electrolytic cells

Postby anjali41 » Fri Mar 13, 2020 8:33 am

In an electrolytic cell, the set up is similar to the galvanic cell. However, the anode is not directly connected to the cathode. Instead, it is connected to an external power supply that drives the reaction.

Sanjana Borle 2K
Posts: 111
Joined: Fri Aug 09, 2019 12:15 am

Re: Galvanic vs Electrolytic cells

Postby Sanjana Borle 2K » Fri Mar 13, 2020 8:37 am

A galvanic cell is essentially where chemical energy drives electrical energy, so in this case E is positive and the reaction is favored. In a electrolytic cell, E is negative, which means the reaction is not favored and an electric current must be supplied in order for it to happen. In this case, electric energy is used to create chemical energy.

Hannah_1G
Posts: 100
Joined: Wed Sep 18, 2019 12:22 am

Re: Galvanic vs Electrolytic cells

Postby Hannah_1G » Fri Mar 13, 2020 8:05 pm

Kimberly Koo 2I wrote:An electrolytic cell converts electrical energy into chemical energy, while a galvanic cell converts chemical energy into electrical energy.
What exactly would an electrolytic cell do? Is it not generating a voltage charge like a galvanic cell since the energy is turned into chemical?

Amir Bayat
Posts: 115
Joined: Sat Sep 07, 2019 12:16 am

Re: Galvanic vs Electrolytic cells

Postby Amir Bayat » Fri Mar 13, 2020 8:30 pm

https://chem.libretexts.org/@api/deki/files/128300/clipboard_e26a57bebc918920030b137efb13b763a.png?revision=1

That link leads to an image which explains the differences of both cells on a diagram. Hope it helps :)


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