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Gibbs Free Energy Measurement

Posted: Tue Feb 19, 2019 10:08 pm
by Nathan Mariano 2G
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?

Re: Gibbs Free Energy Measurement

Posted: Tue Feb 19, 2019 10:10 pm
by MadelineHlobik
Delta G=Delta H— T * Delta S

Re: Gibbs Free Energy Measurement

Posted: Tue Feb 19, 2019 10:18 pm
by Max Hayama 4K
By using the deltaH, deltaS, and T, we can find the value of delta G using the equation (deltaG= deltaH- T*deltaS)

Re: Gibbs Free Energy Measurement

Posted: Tue Feb 19, 2019 10:20 pm
by Nathan Mariano 2G
How do you measure Gibbs Free Energy experimentally? (Without the use of the equation)

Re: Gibbs Free Energy Measurement

Posted: Tue Feb 19, 2019 10:21 pm
by MadelineHlobik
To confirm, do we find the Delta H and Delta S by using standard reaction formula (Sum of Products) — (Sum of Reactants)?

Re: Gibbs Free Energy Measurement

Posted: Wed Feb 20, 2019 10:04 am
by Danny Elias Dis 1E
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.