## Units for delta G

Riya Sood 4G
Posts: 160
Joined: Sat Aug 24, 2019 12:18 am

### Units for delta G

When calculating dela G= -(n)(F)(Ecell), will the units for delta G be KJ/mol or just KJ?

Asha Agarwal 1E
Posts: 51
Joined: Fri Aug 30, 2019 12:16 am

### Re: Units for delta G

The units will just be in kJ since the units in n and F cancel in terms of moles.

VPatankar_2L
Posts: 104
Joined: Thu Jul 25, 2019 12:17 am
Been upvoted: 1 time

### Re: Units for delta G

Since one Faraday is 96485 C/mol, it can be multiplied by n (moles) in the equation delta G = -nFE to just get kJ.

Alice Chang 2H
Posts: 101
Joined: Fri Aug 30, 2019 12:18 am

### Re: Units for delta G

Asha Agarwal 1E wrote:The units will just be in kJ since the units in n and F cancel in terms of moles.

I thought ∆G was in units of kJ since the textbook omits the assumed "/mol" part. A TA mentioned this to me as well in a previous topic. Was I wrong this whole time?

RobertXu_2J
Posts: 104
Joined: Fri Aug 30, 2019 12:17 am

### Re: Units for delta G

Gibbs free ENERGY. delta G is literally referring to a change in energy, so it has the same units as those for energy, which is joules, so the answer would be kJ (kilojoules). Additionally, if you use the equation, you will find that it is kJ

Posts: 107
Joined: Sat Aug 17, 2019 12:16 am
Been upvoted: 1 time

### Re: Units for delta G

VPatankar_2L wrote:Since one Faraday is 96485 C/mol, it can be multiplied by n (moles) in the equation delta G = -nFE to just get kJ.

What are the units for E and how do we get to Joules from coulombs?

Posts: 49
Joined: Thu Jul 25, 2019 12:16 am

### Re: Units for delta G

delta G is given in kJ

Rodrigo2J
Posts: 102
Joined: Sat Jul 20, 2019 12:16 am

### Re: Units for delta G

the unites for delta G would be kilojoules.

VPatankar_2L
Posts: 104
Joined: Thu Jul 25, 2019 12:17 am
Been upvoted: 1 time

### Re: Units for delta G

VPatankar_2L wrote:Since one Faraday is 96485 C/mol, it can be multiplied by n (moles) in the equation delta G = -nFE to just get kJ.

What are the units for E and how do we get to Joules from coulombs?

The units for E are Volts, and one Volt = 1 J/C. So, when you multiply n (moles) by F (C/mol) and E ( V = J/C) you get J.

Jasmine W 1K
Posts: 49
Joined: Sat Sep 07, 2019 12:18 am

### Re: Units for delta G

The unit would be kJ.

Elizabeth Harty 1A
Posts: 125
Joined: Sat Jul 20, 2019 12:16 am

### Re: Units for delta G

What is the difference between delta g naught and delta g?

Riya Sood 4G
Posts: 160
Joined: Sat Aug 24, 2019 12:18 am

### Re: Units for delta G

Elizabeth Harty 1A wrote:What is the difference between delta g naught and delta g?

Delta G naught is for standard conditions at 25 degree celsius, 1 atm, 1 M. Delta G is for non-standard conditions.

Caroline Beecher 2H
Posts: 51
Joined: Wed Nov 14, 2018 12:21 am

### Re: Units for delta G

Elizabeth Harty 1A wrote:What is the difference between delta g naught and delta g?

The units when you are talking about delta G naught would be kilojoules per mole, whereas under nonstandard conditions the units for delta G would be just kilojoules.

Posts: 49
Joined: Thu Jul 25, 2019 12:16 am

### Re: Units for delta G

Alan Cornejo 1a
Posts: 98
Joined: Fri Aug 30, 2019 12:15 am

### Re: Units for delta G

Your units in the end, end up canceling eachother out with the exception of kj which is what you are calculating for deltaG.