## Gibbs Free Energy [ENDORSED]

$\Delta G^{\circ}= \Delta H^{\circ} - T \Delta S^{\circ}$

$\Delta G^{\circ}= -RT\ln K$

$\Delta G^{\circ}= \sum \Delta G_{f}^{\circ}(products) - \sum \Delta G_{f}^{\circ}(reactants)$

Moderators: Chem_Mod, Chem_Admin

Daniisaacson2F
Posts: 30
Joined: Sat Jul 22, 2017 3:00 am

### Gibbs Free Energy

If deltaS is the disorder (for use of a better word) or a reaction, how is that different than delta G?

Lauren Seidl 1D
Posts: 51
Joined: Fri Sep 29, 2017 7:06 am

### Re: Gibbs Free Energy

Delta G combines the values of delta H and delta S to fully determine whether a reaction is favorable or not.

mayasinha1B
Posts: 70
Joined: Fri Sep 29, 2017 7:04 am

### Re: Gibbs Free Energy

Gibbs free energy is a term that defines whether a reaction will be spontaneous or not. It combines the entropy and enthalpy (delta H) to determine the favorability of a reaction.

OliviaShearin2E
Posts: 37
Joined: Fri Sep 29, 2017 7:05 am

### Re: Gibbs Free Energy

Can you further clarify your question?

Jessica_Singh_1J
Posts: 50
Joined: Fri Sep 29, 2017 7:03 am

### Re: Gibbs Free Energy

DeltaG is a measure of the change in free energy of a reaction, whereas deltaS is a measure of the change in entropy. The equation deltaG = deltaH - TdeltaS uses the changes in enthalpy (deltaH) and entropy (deltaS) at constant temperature to calculate change in free energy (deltaG). A negative deltaG indicates a spontaneous reaction; a positive deltaG indicates the opposite.

Leanne Wong 1H
Posts: 50
Joined: Tue Oct 10, 2017 7:13 am
Been upvoted: 1 time

### Re: Gibbs Free Energy  [ENDORSED]

Gibbs free energy determines the favorability of a reaction whereas S shows the change in entropy/"disorder".

Sohini Halder 1G
Posts: 58
Joined: Thu Jul 13, 2017 3:00 am
Been upvoted: 1 time

### Re: Gibbs Free Energy

Gibbs free energy also shows how much energy is "Free" to do nonexpansion work, whereas entropy relates to the possible number of states a system could be in.

Return to “Gibbs Free Energy Concepts and Calculations”

### Who is online

Users browsing this forum: No registered users and 2 guests