# How does partial pressure affect Gibbs free energy?

##### 1 Answer

Dec 17, 2015

#### Answer:

#### Explanation:

Consider the following reaction:

The free energy of this equilibrium could be found by the following expression:

where

Therefore, the Gibbs free energy is related to the partial pressure by:

Here is a video that explains the origin on this expression in details:

**Thermodynamics | Free Energy, Pressure & Equilibrium.**