Asked by Audrey Durst on Jun 03, 2024
Verified
Why does the evaporation of sweat effectively cool the body?
A) As sweat cools, the distance between water molecules increases, which further reduces the temperature.
B) Since evaporation requires energy to overcome cohesion, heat energy is removed from the body surface.
C) Water in sweat insulates the skin and absorbs heat from the body before evaporation.
D) Water absorbs heat from skin oils, which is removed from the body during evaporation.
E) Breaking the bonds holding water molecules together releases energy, which is absorbed by the solutes present in sweat.
Evaporation
The process by which water and other liquids transform from their liquid state into vapor, a phase change that typically occurs at the surface of the liquid and can be influenced by temperature, pressure, and surface area.
Cohesion
The force that holds together molecules of the same substance, for example, the attraction between water molecules.
Sweat
A liquid produced by the body’s sweat glands, primarily composed of water, salts, and proteins, it functions to cool the body through evaporation.
- Understand the significance of the distinctive characteristics of water, notably the differences in density between its solid and liquid states.
Verified Answer
BV
Beatriz ValdespinJun 10, 2024
Final Answer :
B
Explanation :
When sweat evaporates from the skin, it requires heat energy to overcome the cohesive forces between water molecules in the liquid state. This heat energy is absorbed from the body surface, effectively cooling it.
Learning Objectives
- Understand the significance of the distinctive characteristics of water, notably the differences in density between its solid and liquid states.