Gibb's free energy Units


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beckyolmedo1G
Posts: 34
Joined: Fri Sep 28, 2018 12:21 am

Gibb's free energy Units

Postby beckyolmedo1G » Wed Feb 20, 2019 4:53 pm

Do the units of delta G always have to be kj/mol or can we leave them in J/mol?

Dayna Pham 1I
Posts: 98
Joined: Fri Sep 28, 2018 12:16 am
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Re: Gibb's free energy Units

Postby Dayna Pham 1I » Wed Feb 20, 2019 4:57 pm

I don't think it matters as long as you keep your units consistent throughout and don't add kJ to J.

705192887
Posts: 77
Joined: Fri Sep 28, 2018 12:18 am

Re: Gibb's free energy Units

Postby 705192887 » Wed Feb 20, 2019 5:06 pm

Depending on what the units are in the problem, you can give your answer in terms of J or KJ as they are essentially interchangeable. Normally, it will be in terms of KJ/mol I presume.

MaanasO 1A
Posts: 72
Joined: Fri Sep 28, 2018 12:26 am

Re: Gibb's free energy Units

Postby MaanasO 1A » Wed Feb 20, 2019 5:07 pm

When converted from G to K (equilibrium constant), make sure you deal with J not kJ. Both are fine as answers unless specified otherwise, but make sure to check whether the units cancel properly in calcs.

Celio_G_Dis2C
Posts: 33
Joined: Fri Jan 11, 2019 12:16 am

Re: Gibb's free energy Units

Postby Celio_G_Dis2C » Thu Feb 21, 2019 1:30 am

Either is fine as long as you're careful as to keeping them constant throughout the calculation because I've noticed that the textbook tends to give enthalpy in terms of kJ and Entropy in J so when you're adding them to get Gibbs Free energy make sure they're the same


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