Which process describes the change of a substance from a liquid to a gas?

The process that describes the change of a substance from a liquid to a gas is evaporation. During evaporation, molecules of a liquid gain enough energy to overcome intermolecular forces and transition into the gaseous state. This process typically occurs at the surface of the liquid and can be influenced by factors such as temperature, surface area, and humidity.

In contrast, condensation refers to the opposite process where a gas transforms into a liquid. Precipitation involves water falling from the atmosphere to the ground, usually in the form of rain, snow, sleet, or hail, and does not directly pertain to the conversion of a liquid to a gas. Infiltration is the process by which water penetrates the soil surface, also unrelated to the gas transition. Thus, evaporation is accurately described as the transition from liquid to gas, making it the correct answer.