A teacher opens a bottle of perfume at the front of her laboratory. She notices a smell of flowers. A few minutes later, students at the front of the lab notice the smell too. Those students at the back do not notice it until later. What two processes must take place for the smell from the perfume to reach the back of the lab?
Answers
Answer:
Explanation:
Diffusion is a process by which the molecules intermingle as a result of their kinetic energy and random motion. These molecules are in constant motion making numerous collisions.
When a perfume is sprayed in one corner of a room, or the fumes from a cooking vessel are released, then, being gaseous in nature, the molecules travel quickly through the entire room and the smell spreads through out the room. This process is called as diffusion.
Answer:
Diffusion and Evaporation
Explanation:
1. Diffusion is the process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration. In this case the perfume is diffusing into the air of the room.
2. Evaporation is the process of a liquid turning into vapour- it occurs at the surface of the substance. In this case the perfume(liquid) is evaporating into the air(gas) to change its state into vapour and hence diffuse into the air.