The dissolution of gases in water is virtually always exothermic because __________.
A)one of the two endothermic steps (separation of solute particles)in the solution-formation process is unnecessary
B)the exothermic step in the solution-formation process is unnecessary
C)gases react exothermically with water
D)neither of the two endothermic steps in the solution-formation process is necessary
E)all three steps in the solution-formation process are exothermic

Question

Quizplus · Accepted Answer

The dissolution of gases in water is exothermic because the step of separating solute particles (gas molecules) is not needed, as gases are already separated, reducing the energy required for dissolution.

The Dissolution of Gases in Water Is Virtually Always Exothermic