Gibbs Free Energy Measurement






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Nathan Mariano 2G
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

Gibbs Free Energy Measurement

Postby Nathan Mariano 2G » Tue Feb 19, 2019 10:08 pm

If Gibbs Free Energy (Delta G) is not measured directly like enthalpy of formation (Delta H), how is the Delta G of a reaction measured experimentally?
Last edited by Nathan Mariano 2G on Tue Feb 19, 2019 10:20 pm, edited 1 time in total.

MadelineHlobik
Posts: 33
Joined: Fri Sep 28, 2018 12:22 am

Re: Gibbs Free Energy Measurement

Postby MadelineHlobik » Tue Feb 19, 2019 10:10 pm

Delta G=Delta H— T * Delta S

Max Hayama 4K
Posts: 63
Joined: Fri Sep 28, 2018 12:16 am

Re: Gibbs Free Energy Measurement

Postby Max Hayama 4K » Tue Feb 19, 2019 10:18 pm

By using the deltaH, deltaS, and T, we can find the value of delta G using the equation (deltaG= deltaH- T*deltaS)

Nathan Mariano 2G
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

Re: Gibbs Free Energy Measurement

Postby Nathan Mariano 2G » Tue Feb 19, 2019 10:20 pm

How do you measure Gibbs Free Energy experimentally? (Without the use of the equation)

MadelineHlobik
Posts: 33
Joined: Fri Sep 28, 2018 12:22 am

Re: Gibbs Free Energy Measurement

Postby MadelineHlobik » Tue Feb 19, 2019 10:21 pm

To confirm, do we find the Delta H and Delta S by using standard reaction formula (Sum of Products) — (Sum of Reactants)?

Danny Elias Dis 1E
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: Gibbs Free Energy Measurement

Postby Danny Elias Dis 1E » Wed Feb 20, 2019 10:04 am

I believe the most common way to come up with Gibbs free energy is using the methods listed above. In other words, if there is a way to measure Gibbs free energy directly from an experiment, I don't think we need to know it.


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