## Gibbs Free Energy Definition

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

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

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

megansardina2G
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### Gibbs Free Energy Definition

What is a good definition for “free energy”? I’m a bit confused on what the problems are talking about when the energy is “free”.

Timothy_Yueh_4L
Posts: 57
Joined: Fri Sep 28, 2018 12:28 am

### Re: Gibbs Free Energy Definition

Gibbs free energy refers to the amount of energy from a chemical reaction that can be used to do work.

Saman Andalib 1H
Posts: 73
Joined: Fri Sep 28, 2018 12:16 am

### Re: Gibbs Free Energy Definition

The amount of available energy in a system which is available to do work.

Rami_Z_AbuQubo_2K
Posts: 89
Joined: Thu Jun 07, 2018 3:00 am

### Re: Gibbs Free Energy Definition

What exactly is Gibbs free energy, and how does it related to entropy and enthalpy without strictly looking at the equations.

anthony_trieu2L
Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

### Re: Gibbs Free Energy Definition

Gibbs free is energy is energy available to do work. You can think of it as enthalpy being the total amount of energy and T times delta S (TΔS) being the energy that is lost to entropy. Thus, change in Gibbs free energy is equal to change in enthalpy minus TΔS (ΔG = ΔH – TΔS).

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