What can we say about ∆hsolution for solute/solvent combinations with very similar intermolecular forces?

In the solution, the solute molecules interact with solvent molecules.
If the intermolecular forces are similar between the solvent and the solute enthalpy of solution is close to zero.
Ideal solution is the mixture that has little to no net intermolecular interactions that differentiates it from its ideal behavior, intermolecular forces of attraction are the same and have the same strength, both the solvent and solute will mix at random. 

D. most models represent a real world object in a simpler way

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.