Question

Limonene is a volatile liquid which smells of oranges.

A teacher placed a beaker of limonene at the front of a classroom.
At first, the students at the back of the classroom could not smell the limonene.
After two minutes, the smell of limonene had spread throughout the classroom.
The air in the classroom was still and calm.
Explain these observations using the kinetic particle model.

Answer 1

(limonene) particles go from liquid to vapour

diffusion

random movement of particles / particles move anywhere / particles move in all directions

spreading out of particles / intermingling of particles / mixing of particles / particles collide / particles bounce off each

other / particles go all over

(bulk) movement of particles from higher to lower concentration / movement of particles down concentration gradient