Final answer:
Pressure has very little effect on the solubility of solids or liquids, but significantly affects the solubility of gases. As the partial pressure of a gas above a liquid increases, the gas solubility also increases.
Step-by-step explanation:
Pressure has very little effect on the solubility of solids or liquids, but has a significant effect on the solubility of gases. Gas solubility increases as the partial pressure of the gas above the liquid increases. For example, when more CO₂ is added to a closed container with water, causing a pressure increase, more CO₂ molecules dissolve into the liquid.