Final answer:
A solution of gases is a homogeneous mixture where various gases are uniformly distributed. The atmosphere is an example of a gas solution, primarily made up of nitrogen and oxygen. Gas solutions have weak interactions and can dissolve in each other in all proportions.
Step-by-step explanation:
The solution of gases refers to a homogeneous mixture of two or more gases. Common examples of such solutions are the air we breathe and gas mixtures used in various industrial processes. Earth's atmosphere itself is a solution of gases, consisting of approximately 78% nitrogen, which acts as the solvent, and about 21% oxygen, with other gases like argon (0.9%), and trace amounts of neon, methane, helium. These gas mixtures have properties that are predictable based on the composition of the constituent gases.
Unlike liquid solutions, gas mixtures have very weak intermolecular interactions, almost considered nonexistent in ideal gases, making the mixing process thermally neutral—in other words, with a heat change of about zero (AH soln≈0). The process is governed mainly by entropy, which is an increase in disorder. This means all gases can dissolve in one another easily and in all proportions, forming gas solutions.
Additionally, gases can form supersaturated solutions, which occur when the conditions of temperature or pressure change to where the solution holds more dissolved gas than would be possible under normal conditions.