## G for non-equilibrium

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

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

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

JennyCKim1J
Posts: 51
Joined: Fri Sep 29, 2017 7:04 am

### G for non-equilibrium

For the equation deltaG=G+R*T*lnQ, what is Q?

Jingyi Li 2C
Posts: 56
Joined: Fri Sep 29, 2017 7:06 am

### Re: G for non-equilibrium

Q is the reaction quotient. You use the same formula to calculate K (equilibrium constant) to calculate Q in a non-equilibrium state.

Nehal Banik
Posts: 64
Joined: Thu Jul 13, 2017 3:00 am

### Re: G for non-equilibrium

K would be the equilibrium constant and Q is the constant used to understand the ratio between product and reactants at a certain time, therefore, when you use this equation the Gibbs free energy at standard state, can be equal to -RTlnK so you can all of these together and find the Gibbs Free Energy at Standard State.