Sign of delta G

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Aiden Metzner 2C
Posts: 104
Joined: Wed Sep 18, 2019 12:21 am

Sign of delta G

Postby Aiden Metzner 2C » Wed Feb 19, 2020 1:28 pm

Instead of using the sign of delta G to determine which way a reaction can proceed. Could we also just figure out if Q is less then or more then K and decide that way?

Renee Grange 1I
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Joined: Fri Aug 30, 2019 12:16 am
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Re: Sign of delta G

Postby Renee Grange 1I » Wed Feb 19, 2020 1:32 pm

Yes, I think you could do that.

Morgan Carrington 2H
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Joined: Wed Nov 14, 2018 12:22 am

Re: Sign of delta G

Postby Morgan Carrington 2H » Wed Feb 19, 2020 2:31 pm

It would make sense to do this, but I guess it also depends on what information is given within the problem. You would need enough information to calculate the K value if it was not already given and that could take more time than you have.

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Re: Sign of delta G

Postby KnarGeghamyan1B » Wed Feb 19, 2020 2:34 pm

I agree, it depends on if they give you concentrations (use K vs Q) or information to find enthalpy and temperature (use G).

Amy Pham 1D
Posts: 103
Joined: Fri Aug 09, 2019 12:15 am

Re: Sign of delta G

Postby Amy Pham 1D » Wed Feb 19, 2020 2:40 pm

There are many different methods to determine whether a reaction will proceed to favor reactants or products, or if it is at equilibrium: deltaG and comparing K to Q are two of the many. It all depends on what type of problem it is and what information is given, but yes these are definitely two methods to determine the direction of a given reaction.

Jessica Kwek 4F
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Joined: Mon Jan 06, 2020 7:57 am

Re: Sign of delta G

Postby Jessica Kwek 4F » Wed Feb 19, 2020 4:32 pm

Yes, if you have enough information you should be able to use the values of Q and K.

Gurmukhi Bevli 4G
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Joined: Wed Nov 14, 2018 12:20 am

Re: Sign of delta G

Postby Gurmukhi Bevli 4G » Fri Feb 21, 2020 12:32 am

Yes I think thats possible, provided you have been given enough information.

kristi le 2F
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Joined: Thu Jul 11, 2019 12:15 am

Re: Sign of delta G

Postby kristi le 2F » Sun Feb 23, 2020 11:43 pm

Yes, because one of the equations for delta G depends on Q.

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Re: Sign of delta G

Postby AniP_2D » Mon Feb 24, 2020 9:04 pm

I believe you can, but just to be safe I would use the sign of G to determine the answer for that.

Pablo 1K
Posts: 118
Joined: Sat Feb 02, 2019 12:15 am

Re: Sign of delta G

Postby Pablo 1K » Mon Feb 24, 2020 9:56 pm

Sign of delta G may be the most relevant info as info relating to K may not be available.

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