Cell Potential & Gibbs Free Energy, Standard Reduction Potentials, Electrochemistry Problems

This chemistry video tutorial discusses the relationship between cell potential and gibbs free energy. It contains plenty of examples and chemistry practice problems. It discusses the signs of the potential energy and delta G in determining if a reaction is spontaneous or nonspontaneous. The system is in equilibrium whenever delta G and E is equal to zero. This video discusses Faraday's constant which relates the electric charge to moles of electrons per mole of substance. 1 volt is 1 Joule per coulomb. voltage is a measure of electrical potential energy per unit charge. delta G represents the maximum amount of electrical work that can be performed by a reaction. This tutorial contains problems where you have to find the value of n in order to use it in the equation delta G = -nFE. To find it, you need to balance the half reactions and make sure the moles of electrons are the same using the least common multiple rule. In addition, you need to calculate the cell potential of the net reaction using the standard reduction potential of the half reactions. This lesson is basically a section in electrochemistry.
Intro to Galvanic & Voltaic Cells:
• Introduction to Galvan...
How To Draw Galvanic Cells:
• How To Draw Galvanic C...
Standard Reduction Potentials:
• Standard Reduction Pot...
Cell Potential Problems:
• Cell Potential Problem...
Cell Notation Problems:
• Cell Notation Practice...
___________________________________
Concentration Cells:
• Concentration Cells & ...
Cell Potential & Gibbs Free Energy:
• Cell Potential & Gibbs...
Cell Potential & Equilibrium K:
• Equilibrium Constant K...
Nernst Equation:
• Nernst Equation Explai...
Electrolysis of Water:
• Electrolysis of Water ...
_____________________________________
Electrolysis of Sodium Chloride:
• Electrolysis of Sodium...
Electrolysis & Electroplating Problems:
• Electrolysis & Electro...
Electrochemistry Practice Problems:
• Electrochemistry Pract...
SAT Chemistry Subject Test Review:
• SAT Chemistry Subject ...
Carbon -14 Dating:
• Carbon 14 Dating Probl...
Beer Lambert's Law:
• Beer Lambert's Law, Ab...
______________________________________
Final Exams and Video Playlists:
www.video-tuto...
Full-Length Videos and Worksheets:
/ collections
Chemistry PDF Worksheets:
www.video-tuto...

[@TheOrganicChemistryTutor]

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[@hetals.macwan375]

Thanks... I was confused a bit about finding 'n' in the Gibbs expression...

[@naangokainge]

Same. I came here just for that.

[@72Jignesh]

Me too

[@susmasingha4711]

Me too
I am here for that only.

[@metamorfoxsis5935]

Yo same

[@_empty_4945]

Saaame I was being a dumbass trying to add all the moles in the equation

[@mohammadmunzurulhaque3197]

This Teacher teaches EVERYTHING . Still doesn't care about changing the name of his channel.... Very nice to see that How passionate He is particularly with the "knowledge-spreading-mission " Name doesnt matter. We all know him as the " ORGANIC CHEMISTRY TUTOR "

[@prachisharma463]

You are now my master.
I bow my head in respect.

[@husenarbie8038]

Listening to this video is more useful than listening to my chemistry teacher ay school. This seriously help. Please keep making this kind of video.

[@yonissaid4057]

i was taught to do it in a different way. LIke E overall = E reduction - E oxidation. Still got the same answer, but they way you did it relates exactly like adding up net reactions with their enthalpies. Which I had lots of practice with already, so it's simplier to do it your way since I'm already use to it. Thanks!

[@Miss_Untichlobanty]

HEY PLEASE HOW DO I KNOW WHICH ONE TO REVERSE AMONGST THE TWO HALF EQUATIONS INCASE OF EXAMPLE 2?

[@stevenarackal104]

@@Miss_Untichlobanty split the reaction into two half reactions. For the second example, once the two half reactions were written down, the Al one had switched sides, therefore you switch that one

[@simonvutov7575]

those are two dif equations buddy

[@user-un8nh7mp1j]

thanks alot. you have no idea how helpful this is.

[@buttercup1627]

Wow I now know how to find n. Electrochemistry has never been simpler, all thanks to you. 😁

[@speqqs7481]

I am not gonna subscribe, because I dont want this to fill my feed, however you sir are the best. One might even say God. XOXO - Kyle

[@user-cd2ip4ez9d]

Damn I am a international student studying in chinese medium. Just to understand the cell potentials connection with gibs energy I even saw 1 hr worth of helmholtzz free energy.... And finally I see organic chemistry has covered the topic I was looking for ;-;

[@Theo-iw6ym]

This guy was sent by God 🙏🏾

[@corinna4639]

Thank you so much. This helped a lot :)

[@trishiyaaamiller3966]

Thank you for the great video!❣️
It helps a lot.

[@febbysety8657]

And tomorrow, the problem they given to me are way harder

[@edmundwiafe5411]

Thank you so much. you are now my master

[@nourahd6994]

Amazing .. thank you allote from saudi Arabia

[@arpitgami3522]

Thank you so much this really helped alot !!!🙏🏻❤️👍

[@jaymaganti6604]

Thank You! This video helped a lot.

[@matthewmesser7859]

why are you adding both cells if equation is E=E (cathode)-E (anode)

[@maheshkumar-fv9zn]

Cause for oxidizing agent or e anode is negative quantity and a negative in front of negative gonna make it positive

[@joelcharles2063]

God bless u bro🙏❤️

[@sissyime8004]

I’m just confused on why ,when we want to find E (not in standard conditions) we use delta G that’s in standard conditions or does it not matter that delta G is in standard conditions?

[@jayeshpatil6303]

Your video made my day. :)

[@stephenrose1902]

What if the balanced equation ends up with a coefficient in front of the oxidized compound, which in turn changes the number of electrons transferred between the compound that is oxidized and the compound that is reduced? How many electrons would you use for the calculation in that instance?

[@kailashsingh1891]

As far as I know the cell potential doesn't depend on stoichiometric coefficients whereas Gibb's free energy change does.

[@meenakshiphase7481]

Thank You So Much Sir 🙏🙏

[@vabybaby9682]

Thank you Mr. Organic

[@ishansalam709]

life saver

[@tanyokay9797]

BEST TEACHER EVER~

[@jamoduanuoluwapo7246]

Thanks so very much

[@pikscooking1798]

Thanks Bruhh !!!

[@Mooloolah28]

Thank you! ❤️

[@Dhruvgod]

Thank you Soo much 💪

[@mafitansari9884]

Smart solution

[@912sonic]

isnt delta g usually kj/MOL???

[@rickylife]

good job

[@campFTW]

Thank you soo much!!!

[@Miss_Untichlobanty]

HEY PLEASE HOW DO I KNOW WHICH ONE TO REVERSE AMONGST THE TWO HALF EQUATIONS INCASE OF EXAMPLE 2?

[@campFTW]

@@Miss_Untichlobanty you actually need to reverse both of them in order to know how many electrons lost or gained.
In ex 2, to balance the equation multiply missing number of electron if they are not balanced like
Al has turned into Al3+ but
Cu2+ has turned into just Cu
So there's difference in number of electrons
Multiply Cu by 3
Multiply Al by 2
You get 6 electrons
Therefore n=6

[@arsal16]

Not me watching your video 9 hours before my test

[@maheshr5126]

Nice video sir

[@hebronm385]

Thank you!! And which country are you from?

[@mohammadmunzurulhaque3197]

Neptune

[@jimhalpert9803]

I'm from Uranus

[@annsmahboob3495]

Mars

[@unboundpotato6409]

why did you add the 2 cell potentials
10:58

[@unboundpotato6409]

oh never mind I know now
because you turned the equation around

[@jimhalpert9803]

Also the time stamp was horribly wrong

[@Itz_ronny07]

Thanks a lot

[@techzulkifel]

good

[@richardjremojo6393]

The best 👑

[@curiouscat1487]

MAY MY GOOD LORD BLESS YOU.

[@faithakoth7391]

Thanks

[@dbb903]

?? why aren't you using the electrode potential equation ?? E of half cell where reduction occurs minus E of half cell where oxidation occurs

[@tolaniidriss1030]

I was just thinking the same thing because I thought we were supposed to subtract and not add...?

[@freallee]

Did anyone figure this out? Why did he add the cell potentials instead of subtracting them?

[@ummiatikah3333]

@@freallee cuz we reverse the Al equation, if you don't wanna reverse it and using the equation we still got the same thing

[@sick_my_duck]

@@ummiatikah3333 isnt Al oxidation and Cu reduction tho? correct me if im wrong

[@sebgrootus]

calooms

[@k1eranzhang159]

谢谢🙏

[@sridevidevi7158]

At 5.34 y are u inversing Al sir ,y not cu

[@Miss_Untichlobanty]

Have found out the answer please tell me if you do

[@syedashobnam2573]

Why is n=6

[@EmapMe]

Can we calculate standard change in Gibbs free energy for the first reaction without knowing the standard cell potential?

[@pameladiaz8307]

You need to know the standard cell potential in order to calculate for the Gibbs free energy.

[@thomasmcgreevy5071]

It's pronounced "coolum" not "kalloom"

[@tompoullette4852]

word.

[@renuchaudhary406]

:))) 👍👍👍

[@Staycalm69143]

Does the F vary , somewhere it is taken as 96500 ?????

[@wwayaka8508]

Thank you so much, it helped a lot!!