Question

to find Keq do you include only gases and aqueous solutions or only aqueous solutions

Answer 1

Both gases and aqueous solutions will be used. Only the phases that are constant are emitted like pure solid and liquids.

To be precise Equilibrium constant is actually a ratio of activities, and the activity of a species is defined to be relative to some “standard state”. The equation ΔG⊖=−RTlogKΔG⊖=−RTlog⁡K only holds when the standard state that’s used to define K is the same standard state that’s used to define the free energies of formation that go into ΔG⊖.