Rapid escape of a gas from a liquid where it is dissolved is called what?

• A. Vaporization
• B. Effusion
• C. Effervescence
• D. Desorption

Answer: (C)

Effervescence is the term for the rapid escape of a dissolved gas from a liquid, shown when gas bubbles form and rise through the liquid as the gas leaves the solution. This happens when conditions change to reduce gas solubility, such as a drop in pressure or a rise in temperature, causing the dissolved gas to come out of solution quickly. You can see it in carbonated beverages fizzing as CO2 escapes, or when an antacid tablet fizzes in water.

Vaporization is liquid turning into gas at the surface, typically due to heating. Effusion is the movement of gas through a tiny opening. Desorption is the release of molecules from a solid surface.