## Work and Battery system

$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$

JustinHorriat_4f
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

### Work and Battery system

I still don't understand how A battery system has to do with work? Why is the amount of energy that leaves the system -w? And When does energy leave a battery system?

SnehinRajkumar1L
Posts: 101
Joined: Thu Jul 11, 2019 12:15 am

### Re: Work and Battery system

A battery will always do work because it's potential must be positive for it to provide energy to do work in the first place. Energy leaves a battery when it is being used.

Matt Sanruk 2H
Posts: 131
Joined: Wed Sep 18, 2019 12:21 am

### Re: Work and Battery system

Is work and delta G related?

Ashley Fang 2G
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

### Re: Work and Battery system

Yes, work (max) equals delta G under constant temperature and pressure.

Matt Sanruk 2H
Posts: 131
Joined: Wed Sep 18, 2019 12:21 am

### Re: Work and Battery system

Ashley Fang 2G wrote:Yes, work (max) equals delta G under constant temperature and pressure.

What is the exact formula?

Sean Cheah 1E
Posts: 105
Joined: Wed Sep 18, 2019 12:20 am

### Re: Work and Battery system

Matt Sanruk 2H wrote:
Ashley Fang 2G wrote:Yes, work (max) equals delta G under constant temperature and pressure.

What is the exact formula?

He basically already wrote out the exact formula. At constant temperature and pressure, $w_{max} = \Delta G$. You can think of delta G as the amount of energy that is released that is free to do work. Therefore, the maximum amount of work that can be done would use up all of that released energy, meaning the two are equal.

Matt Sanruk 2H
Posts: 131
Joined: Wed Sep 18, 2019 12:21 am

### Re: Work and Battery system

Oh ok, so under these conditions they are basically equal to each other. Thanks!

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