Delta G= Wmax


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Kelly Seto 2J
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Joined: Thu Jul 27, 2017 3:00 am

Delta G= Wmax

Postby Kelly Seto 2J » Fri Feb 09, 2018 3:47 pm

Can someone explain what Wmax means? Also why are delta G and Wmax equal at constant T and P? What is the relationship between the two?

Aditya Pimplaskar 1J
Posts: 32
Joined: Thu Jul 13, 2017 3:00 am

Re: Delta G= Wmax

Postby Aditya Pimplaskar 1J » Fri Feb 09, 2018 3:52 pm

Wmax refers to the maximum amount of work a system can do. Delta G is the maximum work that a system can do at a given temperature and pressure. So we can equate the two.

I also found this previous post on Chemistry Community from Dr. Lavelle: viewtopic.php?t=5141

aaron tang 2K
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Joined: Thu Jul 27, 2017 3:01 am

Re: Delta G= Wmax

Postby aaron tang 2K » Mon Feb 12, 2018 4:05 pm

DeltaG is the maximum amount of work a system can do at a given temperature and pressure, while WMAX is the maximum amount of work a system can do. Therefore, you can set them equal to each other.

melissa carey 1f
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Joined: Fri Sep 29, 2017 7:06 am

Re: Delta G= Wmax

Postby melissa carey 1f » Thu Feb 15, 2018 9:12 am

Whats the relationship between free energy and max work - are they equal?

Julie Steklof 1A
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Joined: Thu Jul 13, 2017 3:00 am

Re: Delta G= Wmax

Postby Julie Steklof 1A » Thu Feb 15, 2018 11:54 pm

melissa carey 1f wrote:Whats the relationship between free energy and max work - are they equal?


I wrote in my notes from 2/9 that maximum cell potential is directly related to the free energy difference between reactants and products in the cell/ redox reaction.

DamianW
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Joined: Fri Sep 29, 2017 7:06 am

Re: Delta G= Wmax

Postby DamianW » Sun Feb 18, 2018 8:13 pm

Why are they equal?

Ridhi Ravichandran 1E
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Joined: Sat Jul 22, 2017 3:01 am

Re: Delta G= Wmax

Postby Ridhi Ravichandran 1E » Sun Feb 18, 2018 9:00 pm

Wmax actually represents the maximum non-expansion work a reaction can do. Basically, an exothermic reaction will release a certain amount of energy, and this energy can be harnessed to do other kinds of work, such as power a non-spontaneous reaction.

Scott Chin_1E
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Joined: Sat Jul 22, 2017 3:00 am

Re: Delta G= Wmax

Postby Scott Chin_1E » Sun Feb 18, 2018 9:02 pm

Does Wmax usually occur when the system is at equilibrium?

804899546
Posts: 51
Joined: Sat Jul 22, 2017 3:00 am

Re: Delta G= Wmax

Postby 804899546 » Mon Feb 19, 2018 9:39 pm

Scott Chin_1E wrote:Does Wmax usually occur when the system is at equilibrium?

No, at equilibrium Delta G and Ecell are equal to zero, and therefore work at equilibrium would be equal to zero. This makes sense, as at equilibrium there would be no electrons flowing between the anode and the cathode.


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