Question

How does partial pressure affect delta G?

Answer 1

`DeltaG=DeltaG^@+RTln(((P_(NH_3))^2)/(P_(N_2)*(P_(H_2))^3))`

Explanation:

The relationship between `DeltaG` and pressure is: `DeltaG=DeltaG^@+RTlnQ`

Where `Q` is the reaction quotient, that in case of a reaction involving gaseous reactants and products, pressure could be used.

For example: `N_2(g) + 3H_2(g) -> 2NH_3(g)`

The reaction quotient is: `Q=((P_(NH_3))^2)/(P_(N_2)*(P_(H_2))^3)`

Therefore, `DeltaG=DeltaG^@+RTln(((P_(NH_3))^2)/(P_(N_2)*(P_(H_2))^3))`

I recommend this video that explains this concept in details: