Gibbs Free Energy and Entropy






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Sophia_Kiessling_2L
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Gibbs Free Energy and Entropy

Postby Sophia_Kiessling_2L » Thu Feb 28, 2019 8:47 pm

Does a negative deltaG mean that the entropy is always lower? Just wondering because the textbook says that a solid has a lower G value than a liquid or gas.

Chem_Mod
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Re: Gibbs Free Energy and Entropy

Postby Chem_Mod » Thu Feb 28, 2019 9:48 pm

for a negative delta G, the sign of delta S can be both positive or negative

Riley Dean 2D
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Re: Gibbs Free Energy and Entropy

Postby Riley Dean 2D » Sun Mar 03, 2019 1:55 pm

It doesn’t always mean that entropy is lower, you could have different sign combinations for enthalpy and entropy causing the negative delta G

Anmol_cheema_2F
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Re: Gibbs Free Energy and Entropy

Postby Anmol_cheema_2F » Sun Mar 03, 2019 3:21 pm

The sign of delta G is dependent on enthalpy, temperature, and entropy so entropy doesn't necessarily have to be negative; it depends on all three.

Hilda Sauceda 3C
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Re: Gibbs Free Energy and Entropy

Postby Hilda Sauceda 3C » Sun Mar 03, 2019 3:43 pm

No in that case its dependent on the Temp, enthalpy and entropy so it can be + or -.

yuetao4k
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Re: Gibbs Free Energy and Entropy

Postby yuetao4k » Fri Mar 15, 2019 6:24 pm

The other variable in the ghost equation also factor in whether or not delta S is positive or negative.

Nghi Nguyen 2L
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Re: Gibbs Free Energy and Entropy

Postby Nghi Nguyen 2L » Fri Mar 15, 2019 9:24 pm

there are a lot of variables that affect delta G, so entropy could be positive or negative


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