Select the steps that are associated with energy entering the system. Check all that apply. View Available Hint (s) Check all that apply.

1. the separation of solvent molecules

2. the separation of solute molecules

3. the mixing of solute and solvent molecules

1. the separation of solvent molecules = Endothermic heat absorbing process

2. the separation of solute molecules = Endothermic heat absorbing process

3. the mixing of solute and solvent molecules = Exothermic heat producing process

Explanation:

The Enthalpy of Solution can be found as follows involving three components: ΔHsoln = ΔH1 + ΔH2 + ΔH3

1. Separation of the solute molecules from each other (expanding the solute), this is an endothermic reaction. (ΔH1)

2. Separation of the solvent molecules from each other (expanding the solvent molecules), this is also an endothermic reaction (ΔH2)

In their separated states, the solute and solvent molecules are free to attract each other in solution.

3. The exothermic reaction of the solute and solvent resulting in the formation of the solution. (ΔH3)