What causes latent heat to be drawn from water during evaporation?

• A. High atmospheric pressure
• B. Low specific heat
• C. Increased temperature
• D. Evaporation process

Answer: (D)

The evaporation process is responsible for drawing latent heat from water. When water evaporates, it transitions from a liquid state to a gaseous state. This phase change requires energy, known as latent heat, which is absorbed from the surroundings. This energy is needed to break the intermolecular bonds in the water molecules, allowing them to escape into the air as vapor. The process of evaporation cools the remaining liquid since it is losing energy in the form of heat; this is why evaporation is often associated with a cooling effect.

In contrast, the other options do not directly relate to the mechanism of heat transfer during evaporation. High atmospheric pressure may actually hinder the evaporation process rather than enhance it, while low specific heat would not be relevant in this context since it pertains to the amount of heat required to change the temperature of a substance rather than its phase. Increased temperature can promote evaporation, but the primary cause of latent heat being drawn away during the phase change is the nature of the evaporation process itself.