Pressure and Volume on Spontaneity

[Justin Lau 1D]

Does pressure and/or volume affect the spontaneity of a reaction? Is it because entropy is changing when these factors change?

[Samantha Kan 2L]

Yes, pressure and volume do affect the spontaneity of a reaction because they contribute to entropy. For example, when a system is expanding, there is more area and translational energy. This results in a higher entropy.

[Daniisaacson2F]

Yes, you have to take into account the different ways that you can solve for deltaS. Since deltaG is the spontaneity of a reaction, it depends on S so it also depends on pressure and volume.