Heterogeneous and Homogeneous Equilibrium?

Question

Why does the amount of surface area of a reactant only affect heterogeneous reactions and NOT homogeneous reactions?

Answer 1

In a homogeneous reaction all of the substances are contacting each other at the molecular level, so surface area is not relevant as the reactants are able to easily contact and interact with each other

In a heterogeneous reaction, effective collisions can only take place at the interface bewtween the two substances. So the surface area of contact plays an important role. Imagine how slow a reaction might be between two large boulders of the reactants touching each other compared to if they were dissolved together.

Answer 2

i think its b/c homogeneous are already in the same phase