Which of the following phase changes involves a gas turning into a liquid?
a
Condensation
b
Boiling
c
Sublimation
d
Freezing
b
Boiling
The correct answer is a. Condensation.
The phase change that involves a gas turning into a liquid is called condensation. To determine the correct answer, you need to understand the different phase changes and their definitions.
Condensation occurs when a gas changes into a liquid. This process usually happens when a substance loses heat energy and its molecules slow down, coming closer together. The opposite of condensation is evaporation, where a liquid turns into a gas.
Boiling is a phase change where a liquid changes into a gas rapidly, typically due to the addition of heat energy. This process occurs at a specific temperature called the boiling point.
Sublimation is a phase change where a solid directly transforms into a gas without passing through the liquid phase. This happens when the substance's vapor pressure exceeds its solid pressure.
Freezing is the phase change when a liquid turns into a solid. It occurs when a substance loses heat energy and its particles slow down, forming a solid crystal lattice.
Based on these definitions, we can conclude that the correct answer is "a) Condensation."